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Controls Engineer at Marathon Fusion | San Francisco

Marathon Fusion

Full-time|On-site|San Francisco

Join Our Team as a Controls EngineerAt Marathon Fusion, we are at the forefront of engineering technologies that will revolutionize energy production through fusion. Unlike others who focus solely on developing new fusion devices, our mission centers on creating practical systems to deploy fusion energy at a scale that addresses climate change.Our innovative…

Apr 12, 2026

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Principal Scientist in Fusion Energy

Marathon Fusion

Full-time|$160K/yr - $210K/yr|On-site|San Francisco

About Marathon FusionAt Marathon Fusion, we are pioneering the engineering technologies essential for transitioning fusion from experimental stages to operational power plants. While many in the industry concentrate on developing new fusion devices, we are dedicated to creating practical systems that facilitate the deployment of fusion energy at a scale relevant to combat climate change.Our focus includes the development of critical fuel cycle technologies and plant-level systems that support stable isotope production, fuel cycle closure, and advanced blanket systems aimed at enabling both energy generation and the production of valuable co-products.Established in 2023, Marathon Fusion is committed to constructing the components and systems that will render fusion a practical, abundant, and reliable energy source for the 21st century.Culture at Marathon FusionWe cultivate a startup environment that demands focus, adaptability, and prioritization in a rapidly evolving landscape. Success in this setting requires exemplary proactive communication across various roles and backgrounds, the ability to foster and maintain trust among team members, and a commitment to continuous learning and skill development. We emphasize the importance of self-direction in each team member.

Feb 15, 2024

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Controls Engineer at Humble Robotics | San Francisco

Humble Robotics

Full-time|On-site|San Francisco

Join the Future of TransportationAt Humble Robotics, you will be at the forefront of revolutionizing ground transportation with our innovative autonomous, zero-emissions hauler. Our mission is to significantly reduce freight costs using cutting-edge vision-based AI technology, tailored for the modern global logistics landscape.We pride ourselves on being a dynamic team comprised of industry veterans and forward-thinking innovators. We understand that a thriving culture can't be engineered, but when it aligns, it creates an extraordinary journey.Experience progress like never before.

Apr 21, 2026

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Controller at SFMOMA | San Francisco

San Francisco Museum of Modern Art

Full-time|Hybrid|San Francisco, CA

The San Francisco Museum of Modern Art (SFMOMA) stands as one of the largest institutions dedicated to modern and contemporary art in the United States, serving as a vibrant cultural hub for the Bay Area community. Art is an integral part of our lives—it inspires us and connects us daily. In a world that increasingly values these connections, we remain steadfast in our commitment to our core values.Inclusive: We aim to represent a multitude of voices in meaningful dialogue.Passionate: Our engagement with art transcends mere employment; it is a lifestyle.Brave: We approach our endeavors with courage and a spirit of adventure, always open to exploring diverse perspectives.Empathic: Our goal is to operate as individuals, rather than as an institution.SFMOMA is a space for the endlessly curious to engage with, support, and experience contemporary art. We believe that modern and contemporary art shapes our thoughts, perceptions, and appreciation of the diverse narratives that surround us. Our mission is to cultivate an environment that sparks joy, fosters a sense of belonging, and values every individual for their unique identity.Schedule: Full Time, 35 hours/week, with at least three days required on-site.As the Controller at SFMOMA, you will oversee all facets of accounting, reporting, auditing, and payroll functions. Your role will include supporting presentations to the board audit committee and managing the operational aspects of the Finance department, which encompasses responsibilities for accounting, accounts payable and receivable, payroll, monthly and yearly closings, and tax return preparations. You will ensure that the Museum has efficient systems and procedures to facilitate effective program implementation and conduct seamless audits. Collaboration with program leaders and their teams is essential, as you will educate them on finance and accounting procedures while exploring how the finance function can enhance program operations.· Within 30 days, you will have developed a solid understanding of Finance roles, workflows, and internal partnerships, gaining familiarity with the systems, applications, and reports managed by the Finance team.· By 90 days, you will have established positive, collaborative relationships and will be adept at engaging with board members, staff, external vendors, and the general public.

Feb 3, 2026

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Controller at Lambda | San Francisco

Lambda

Full-time|Hybrid|San Francisco Office

At Lambda, The Superintelligence Cloud, we are at the forefront of AI cloud infrastructure, empowering tens of thousands of clients ranging from innovative AI researchers to large enterprises and hyperscalers. Our mission is to make computing as accessible as electricity, providing everyone with the extraordinary capabilities of superintelligence, one person, one GPU.Join us in our quest to build the world's premier AI cloud platform.*Note: This role requires presence in both our San Francisco and San Jose offices for a total of 4 days each week.We are looking for a highly skilled Controller to lead and expand our accounting functions during a critical growth phase. Reporting directly to the Chief Accounting Officer, you will play a vital leadership role in establishing a top-tier controllership function that supports our rapidly growing multi-billion-dollar AI infrastructure platform.As Lambda continues to enhance its GPU cloud services, enterprise contracts, and capital-intensive data center infrastructure, you will ensure accounting excellence and operational rigor aligned with our long-term strategic goals. The Controller will apply strong judgment, extensive operational expertise, and the capability to develop systems, processes, and teams that meet public-company standards.This is a hands-on leadership role for someone eager to build, elevate, and modernize a high-performing accounting organization within a dynamic and fast-paced environment.

Mar 31, 2026

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Senior Motor Control Engineer at DoorDash | San Francisco

DoorDash, Inc.

Full-time|$139.4K/yr - $205K/yr|On-site|San Francisco, CA

Join DoorDash Labs, an innovative team dedicated to revolutionizing last mile logistics through robotics and automation. If you're passionate about transforming service delivery for millions, we want to hear from you!About the RoleIn this pivotal role, you will develop embedded control algorithms for essential ECUs that govern the powertrain and additional systems of our robots. Your responsibilities will encompass meticulous performance testing across multiple stages including simulation, component evaluation, and comprehensive road tests, while consistently improving our development methodologies and testing procedures. You will collaborate closely with the Technical Lead of our Autonomy team.Your Responsibilities Include:Designing and implementing sophisticated algorithms for closed-loop vehicle controls, supervisory controls, thermal management, and auxiliary functions of diverse robotic systems.Building robust infrastructure including test cases and functional models to systematically validate algorithmic behavior.Proactively innovating features and processes to meet and exceed the expectations of internal stakeholders such as robot operations and autonomy software teams.Identifying and addressing new challenges using skills and knowledge acquired on the job.

Apr 9, 2026

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Senior Mechanical Engineer - Lithium

Marathon Fusion

Full-time|On-site|San Francisco

Join Marathon Fusion as a Senior Mechanical EngineerAt Marathon Fusion, we are pioneering the engineering technologies required to transform fusion science from experimental concepts into operational power plants. While much of the field is focused on developing new fusion devices, our mission centers around creating practical systems that facilitate the large-scale deployment of fusion energy, essential for addressing climate change.Our expertise lies in developing vital technologies for the fuel cycle and plant operations that enable stable isotope production, fuel cycle closure, and advanced blanket systems, which are crucial for energy generation and producing high-value co-products.Founded in 2023, Marathon Fusion is on a mission to build the components and systems required to make fusion a practical, abundant, and reliable energy source for the future.Our CultureWe operate in a dynamic startup environment that demands focus, adaptability, and the ability to prioritize in a rapidly changing landscape. Success here requires exceptional proactive communication, the ability to foster trust among team members, and a commitment to continuous learning and skill development. We place a strong emphasis on self-direction and initiative within our team.About Your RoleAs a Senior Mechanical Engineer on our Lithium Team, you will collaborate with electrical and mechanical engineers, physicists, and scientists to prototype, test, and implement innovative solutions aimed at advancing the fusion fuel cycle. Your hands-on design and testing experience with electromechanical systems will be instrumental in developing and refining a groundbreaking isotope separation device.Your ResponsibilitiesLead the design and enhancement of the isotope separation system, focusing on robust and scalable deployment.Prototype, test, and troubleshoot individual components and integrated systems, working closely with fellow engineers, physicists, and technicians.Develop a deep understanding of key physical processes and utilize experimental data and literature to guide improvements.Thoroughly document experimental outcomes and decisions to inform design iterations and process enhancements.Mentor junior engineers, fostering their technical development and sound engineering judgment.Your QualificationsBachelor's degree or higher in Mechanical or Aerospace Engineering, or a related discipline.A minimum of 5 years of experience in designing, prototyping, and testing electromechanical systems.

Apr 12, 2026

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Corporate Controller at WorkWhile | San Francisco

WorkWhile

Full-time|On-site|San Francisco

About WorkWhileAt WorkWhile, we are committed to transforming the lives of hourly workers by providing them with better earning opportunities and improved quality of life. With over 80 million Americans engaged in hourly employment, many face unpredictable schedules and minimal benefits, leading to financial uncertainty.Transitioning from a fast-growing labor marketplace, WorkWhile is now developing a robust workforce platform. Our offerings now include Newday (our innovative SaaS workforce management system) and WorkWhile Wallet (a fintech solution designed to enhance worker earnings and credit access), making our financial operations more intricate.We are on a mission to revolutionize frontline work by creating a more adaptive and efficient labor market. Utilizing AI technology, the WorkWhile platform enables businesses to swiftly connect with top-tier talent. Additionally, workers enjoy benefits such as same-day pay, complimentary telehealth services, skill enhancement opportunities, and the flexibility to select shifts that fit their skills and schedules.With the ambitious goal of aligning incentives and addressing inefficiencies within the labor market, we aim to disrupt the $650 billion staffing and recruiting industry. Supported by Khosla Ventures and recognized by the Inc. 5000 for extraordinary growth, WorkWhile is poised to reshape the future of work.About the RoleWe are on the lookout for a technically proficient and operationally sound Corporate Controller to partner with the CFO in establishing a premier accounting function. In this role, you will go beyond traditional accounting responsibilities; you will design the financial framework that underpins high-volume transaction processing, sophisticated revenue recognition (across Marketplace and SaaS models), and banking-level treasury operations.Key Responsibilities1. Core Accounting Operations & RigorFull Cycle Management: Lead all aspects of the accounting function, encompassing General Ledger, Payroll, Procure-to-Pay (P2P), Order-to-Cash (O2C), and Record-to-Report (R2R).Data Integrity: Ensure a high standard of accuracy and completeness in accounting records. Collaborate with the Data Science team to reconcile financial data in the ERP with operational data sources (e.g., BigQuery/Metabase revenue tables).W2 & 1099 Payroll: Manage the complexities involved in processing high-volume payroll for a diverse workforce, ensuring careful handling of W2 employees (taxes, benefits, withholdings) versus 1099 contractors.

Dec 19, 2025

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Researcher - Loss of Control at OpenAI | San Francisco

OpenAI

Full-time|On-site|San Francisco

About Our TeamThe Safety Systems organization at OpenAI is dedicated to ensuring the responsible development and deployment of our most advanced AI models. We create evaluations, safeguards, and safety frameworks to ensure that our models operate as intended in real-world scenarios.The Preparedness team plays a critical role within the Safety Systems organization, guided by OpenAI’s Preparedness Framework.As frontier AI models hold the potential for significant benefits to humanity, they also present escalating risks. The Preparedness team is essential in preparing for the development of increasingly capable frontier AI models, focusing on identifying, tracking, and preparing for catastrophic risks associated with these technologies.The mission of the Preparedness team includes:Monitoring and predicting the evolving capabilities of frontier AI systems, especially regarding risks that could have catastrophic consequences.Establishing concrete procedures, infrastructure, and partnerships to mitigate these risks and safely advance the development of powerful AI systems.The Preparedness team integrates capability assessment, evaluations, internal red teaming, and mitigations for frontier models, coordinating overall AGI preparedness. This fast-paced and impactful work holds significant importance for both our organization and society.About the RoleAs frontier AI systems become more capable, they exhibit greater autonomy, the ability to pursue long-term goals, adapt to feedback, and utilize tools. While these advancements offer immense potential, they also raise the risk of models behaving in misaligned or deceptive ways, which can be difficult to supervise or contain. Addressing the risk of loss of control is a key challenge in the safe development and deployment of advanced AI systems.In your role as a Researcher focused on loss of control mitigations, you will design and implement an end-to-end mitigation strategy aimed at reducing the risk of intentionally subversive or inadequately controllable behaviors in OpenAI’s products and internal operations. This position necessitates strong technical expertise and close collaboration across functions to ensure that safeguards are enforceable, scalable, and effective. You will directly contribute to establishing robust protections as model capabilities evolve.

Mar 10, 2026

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Controller at Bright Machines | San Francisco

Bright Machines

Full-time|On-site|San Francisco, California

RETHINK MANUFACTURING Join us at Bright Machines®, where we are pioneering a revolutionary approach to manufacturing. Our team is composed of passionate innovators dedicated to reshaping the industry through smart automation and data-driven solutions. Our mission is to empower factories with enhanced flexibility, scalability, and resilience, ensuring they meet current demands while preparing for future challenges.As a member of our team, you will have the chance to make significant, lasting contributions that will benefit both our organization and our clients. If you are eager to leverage your exceptional skills to help build the factory of the future, we invite you to connect with us.

Apr 7, 2026

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Systems Controls Lead at Fluidstack | San Francisco

Fluidstack

Full-time|$180K/yr - $250K/yr|On-site|San Francisco, CA

About FluidstackAt Fluidstack, we are pioneering the infrastructure that fuels abundant intelligence. We collaborate with leading AI laboratories, government entities, and major corporations—including Mistral, Poolside, Black Forest Labs, and Meta—to facilitate computing capabilities at unparalleled speeds.Our mission is to urgently transform the concept of Artificial General Intelligence (AGI) into reality. Our team is driven, passionate, and dedicated to constructing world-class infrastructure. We view our clients' success as our own, taking pride in the systems we create and the trust we establish. If you are inspired by purpose, dedicated to excellence, and eager to work diligently to propel the future of intelligence forward, we invite you to join us in shaping what lies ahead.About the RoleAs the Systems Controls Lead, you will take charge of designing, implementing, and continuously refining Fluidstack's General IT Controls (GITC) framework. You will work at the confluence of infrastructure, compliance, and security—ensuring that the systems that drive the future of AI are supported by a robust, auditable control environment. This role is critical and high-impact within a streamlined team, collaborating closely with Engineering, Security, Legal, and Finance to expand our controls program in line with business growth.

Mar 3, 2026

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Controller at WindfallData | San Francisco or Denver

WindfallData

Full-time|On-site|San Francisco or Denver

As an integral member of our Finance team, the Controller at WindfallData will spearhead, manage, and enhance our core accounting operations, encompassing technical accounting, compliance, tax, and financial reporting. Reporting directly to the Vice President of Finance, you will closely collaborate with cross-functional teams including Sales, Customer Success, RevOps, and executive leadership to ensure seamless financial processes. Your primary responsibilities will include establishing and maintaining a robust control environment, developing accounting policies, overseeing critical systems, and designing as well as implementing process improvements. You will play a vital role in assisting the Finance Team in scaling workflows and applying best practices to keep pace with our rapid growth. This role is perfect for a team-oriented individual eager to learn and embrace challenges. Our mission is to revolutionize how organizations perceive and utilize people data, anchored in our core values: (1) Be an excellent communicator; (2) Operate with transparency; (3) Provide leverage, not optimization; (4) Make a difference every day; and (5) Act with integrity and trust.

Mar 17, 2026

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Stationary Engineer at City and County of San Francisco | San Francisco

City and County of San Francisco

Full-time|On-site|San Francisco

Join the City and County of San Francisco as a Stationary Engineer at our Sewage Plant. In this role, you will be responsible for operating and maintaining essential machinery and systems that ensure the safe and efficient processing of sewage. This is a critical position that contributes to public health and environmental protection.

May 1, 2026

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Associate Engineer - Environmental | San Francisco

City and County of San Francisco

Full-time|On-site|San Francisco

Role overview The City and County of San Francisco is seeking an Associate Engineer to join the Environmental department. This position plays a part in citywide efforts to improve public health and meet sustainability targets. The work centers on supporting projects that benefit the community and the environment. What you will do Assist with planning, designing, and carrying out environmental initiatives Collaborate with colleagues on projects that make a direct impact in San Francisco neighborhoods Contribute to efforts that promote public health and advance sustainability throughout the city Location This role is located in San Francisco.

Apr 20, 2026

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Controller at Cala Health | San Francisco Bay Area

Cala Health

Full-time|$190K/yr - $240K/yr|On-site|San Francisco Bay Area

About CalaAt Cala, we are dedicated to liberating individuals from the challenges posed by chronic diseases. Our journey began with the development of the first non-invasive prescription therapy for hand tremors. Following years of meticulous refinement, we proudly launched Cala kIQ — our most advanced therapy yet. Our innovative products have empowered countless individuals to reclaim their confidence and lead fulfilling lives.However, our mission extends far beyond this. Our cutting-edge technology has potential applications across neurology, cardiology, and beyond. We are just at the beginning of our journey to support individuals battling chronic conditions.Role OverviewIn this hands-on role reporting to the CFO, the Controller will oversee the entire accounting function, which encompasses full-cycle month-end close, accounts receivable and payable, payroll, revenue, COGS, inventory, audit, and tax compliance.The Controller will manage the organization’s general accounting processes, assist in crafting financial statements and management reports, oversee cash management, and help in developing departmental budgets and forecasts. Experience in formulating and establishing policies and procedures in a high-growth environment is highly desirable.While the position is ideally based in the San Francisco Bay Area, preference will be given to candidates located near San Mateo/Peninsula, although applicants from other areas are encouraged to apply.Applicants must have current authorization to work in the United States on a full-time basis; Cala will not sponsor work visa applications.The compensation for this role is competitive, with a salary range of $190,000 - $240,000, complemented by a robust benefits package aligned with our overall compensation strategy.

Jan 26, 2026

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Applied Physicist - Lithium Systems

Marathon Fusion

Full-time|On-site|San Francisco

About Marathon FusionAt Marathon Fusion, we are pioneering the engineering advancements necessary to transition fusion energy from experimental stages to operational power plants. While many in the industry focus on the development of innovative fusion devices, we are dedicated to creating the practical systems required to implement fusion energy at a scale relevant to combating climate change.We specialize in developing essential technologies for the fuel cycle and plant operations, including stable isotope production, fuel cycle closure, and advanced blanket systems that facilitate both energy generation and high-value co-products.Founded in 2023, Marathon Fusion is committed to constructing the components and systems that will establish fusion as a viable, abundant, and reliable energy source for the modern era.Our CultureWe operate in a dynamic startup environment that demands focus, adaptability, and prioritization in a constantly evolving landscape. Success here hinges on proactive communication across diverse roles and backgrounds, fostering trust among team members, and a commitment to continuous learning and skill development. We place a high emphasis on self-direction and initiative among our team members.Position OverviewAs an Applied Physicist on the Lithium Team, you will collaborate with mechanical engineers, electrical engineers, and technicians to design, implement, and analyze experiments that propel the advancement of the fusion fuel cycle and stable isotope production. Your hands-on expertise in designing and testing reactive material systems (such as lithium, liquid metals, or molten salts) will be crucial in the development of an innovative isotope separation device.Key ResponsibilitiesDesign and conduct experiments on lithium plasma systems functioning under high-vacuum and elevated temperature conditions.Develop and utilize diagnostic tools, instrumentation, and data acquisition systems to accurately capture and analyze experimental data.Interpret experimental findings to cultivate physical insights, identify key governing phenomena, and enhance system design and processes.Work collaboratively with mechanical and testing engineers to translate experimental data into durable hardware solutions.Contribute to the design and development of vital subsystems, including hollow cathodes, lithium handling, condensation, thermal management, and pumping systems.Qualifications5+ years of experience in designing, prototyping, and testing reactive materials systems.Strong background in experimental physics, particularly in the context of fusion energy and isotopic separation.Proficient in data analysis and interpretation, with a keen ability to derive actionable insights from experimental results.Excellent communication skills and a collaborative mindset are essential for successful teamwork.Bachelor's degree in Physics, Engineering, or a related field; advanced degrees are a plus.

Apr 12, 2026

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Senior Stationary Engineer at City and County of San Francisco | San Francisco

City and County of San Francisco

Full-time|On-site|San Francisco

The City and County of San Francisco seeks a Senior Stationary Engineer to help operate and maintain stationary engines and mechanical systems in city facilities. This full-time position plays a key role in keeping heating, cooling, and power systems running smoothly for the community. What you will do Operate and maintain stationary engines and related equipment in municipal buildings Monitor system performance to keep heating, cooling, and power operations efficient Handle both routine and emergency maintenance tasks as they come up Work closely with colleagues to ensure continuous city services Requirements Solid understanding of mechanical systems and stationary equipment Dedication to safety and sustainable work practices Ability to contribute effectively within a team Experience supporting building infrastructure operations Location This role is based in San Francisco.

Apr 20, 2026

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Backend Engineer at Plaud | San Francisco

Plaud

Full-time|On-site|San Francisco, CA

Join Plaud as a Backend Engineer and be part of an innovative team driving the future of technology. You will design, develop, and maintain scalable backend systems that enhance our product offerings and improve user experiences. This is an exciting opportunity to work with cutting-edge technologies and collaborate with talented professionals in a fast-paced environment.

Mar 2, 2026

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Lead Business Process Controls at Fluidstack | San Francisco

Fluidstack

Full-time|$180K/yr - $250K/yr|On-site|San Francisco, CA

About FluidstackFluidstack is revolutionizing the foundation of artificial intelligence by creating infrastructure that powers abundant intelligence. Collaborating with leading AI laboratories, government entities, and industry giants like Mistral, Poolside, and Meta, we are committed to facilitating compute capabilities at unprecedented speeds.Our mission is to accelerate the realization of Artificial General Intelligence (AGI). We are driven by a strong sense of urgency and a commitment to providing world-class infrastructure. Our focus is on ensuring our customers achieve their desired outcomes, and we take pride in the systems we create and the trust we cultivate. If you are passionate about purpose, dedicated to excellence, and eager to contribute to shaping the future of intelligence, we invite you to join our team.About the RoleAs Fluidstack continues to expand rapidly to cater to the needs of the foremost AI organizations globally, we are seeking a Senior Manager for Business Process Controls to ensure operational excellence aligns with our ambitious technical goals. You will be responsible for designing, implementing, and continuously enhancing the vital processes that drive our business, including customer onboarding, vendor operations, internal workflows, and cross-functional collaboration. Collaborating closely with Engineering, Finance, Sales, and Operations teams, you will work to eliminate inefficiencies, enhance operational efficiency, and establish scalable systems that facilitate Fluidstack's growth without disruptions. This role is highly impactful and visible, ideal for an individual who excels at the intersection of strategic planning and execution.

Mar 9, 2026

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Stationary Engineer at San Francisco Public Library | San Francisco

City and County of San Francisco

Full-time|$130.3K/yr - $130.3K/yr|On-site|San Francisco

Join the San Francisco Public Library as a Stationary Engineer. Under general supervision, you will operate, maintain, troubleshoot, and repair various pumping, heating, ventilating, air conditioning, refrigeration, and auxiliary plant machinery and equipment across Library locations, including the Main Library, 27 branch libraries, and two support facilities. Your role will ensure all equipment and systems operate efficiently and safely while adhering to applicable safety standards.Key Responsibilities:Operate, maintain, and repair a diverse range of mechanical systems, ensuring safe and efficient functionality, potentially using computerized building management and maintenance systems.Conduct thorough inspections of machinery and equipment, ensuring compliance with safety protocols and operational efficiency.Maintain accurate logs of operational data, including gauge readings and water quality analyses, to uphold preventative maintenance standards.Manage the safe storage and handling of treatment chemicals, including potential hazardous materials, ensuring compliance with safety regulations.Communicate effectively with contractors, building tenants, and the public to fulfill your duties.Ensure security of the facilities and respond to emergencies as part of the response team.Perform control tests on water samples to maintain water quality and compliance with State regulations, including conducting water analysis as required.

Mar 9, 2026

Senior Mechanical Engineer - Lithium

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