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Principal - Water/Wastewater Engineering

Apex Companies, LLC

Full-time|$150K/yr - $225K/yr|Hybrid|Hybrid; Woburn, MA

Are you a driven and dedicated professional eager to advance your career with a dynamic consulting and engineering firm? Do you seek an organization that prioritizes your growth and invests in your professional development? If that resonates with you, consider joining Apex Companies!Apex Companies is recognized as one of the fastest-growing engineering and e…

Mar 10, 2026

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Senior Accountant

Unison Infrastructure

Full-time|$200/yr - $200/yr|Hybrid|300 Trade Center Suite 2460, Woburn, MA 01801

Join Unison Infrastructure, a leading global investment firm specializing in telecom and renewable energy infrastructure. Since our establishment in 2003, we have grown to own over 2,200 sites that host essential wireless and telecom transmission assets, alongside renewable power generation projects across the United States and Europe, including Italy, Spain, France, Germany, and Poland. Backed by Ardian, a prominent asset manager with $200 billion in assets under management, we are experiencing significant growth and are looking to add talented individuals to our dynamic team.

Mar 16, 2026

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Senior Counsel

Sirtex Medical Limited

Full-time|On-site|Woburn

Join Sirtex Medical as a Senior Counsel, where you will play an integral role in our legal team, ensuring compliance and providing strategic legal advice across the organization. Your expertise will help navigate complex legal challenges, contributing to our mission of advancing cancer treatment.

Apr 9, 2026

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Lead Software Engineer

Systems Technology Research

Full-time|On-site|Woburn, MA

Join Systems Technology Research as a Lead Software Engineer, where you will spearhead innovative software solutions and drive impactful projects. We are seeking a dynamic leader with a passion for technology, who can inspire and guide a team of talented engineers. Your expertise will shape our software development processes and ensure high-quality deliverables.

Apr 7, 2026

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Scientist/Senior Scientist - Assay Development

Spear Bio

Full-time|On-site|Woburn Office

Spear Bio, established in 2021, is a dynamic and well-funded biotech start-up located in Woburn, Massachusetts. Our innovative technology, Successive Proximity Extension Amplification Reaction (SPEAR), presents a groundbreaking wash-free immunoassay platform that offers unmatched sensitivity. We are committed to transforming early disease diagnosis and monitoring by delivering scalable, ultra-sensitive solutions that ensure exceptional accuracy in detecting low-abundance biomarkers. This empowers clinicians and researchers to enhance patient outcomes and promote global health.Scientist/Senior Scientist - Assay Development:In this critical role, the Scientist/Senior Scientist will drive Spear Bio's assay development efforts for our cutting-edge ultrasensitive immunoassays. Reporting to the Senior Director of Assay Development, this position will work closely with both Platform and Product Development teams. The ideal candidate will possess a robust history of developing and refining immunoassays tailored for both research and clinical applications, specifically aimed at detecting low abundance protein biomarkers associated with neurodegenerative diseases.This position requires onsite presence at our Woburn, MA laboratory five days a week.Responsibilities:Create a suite of ultrasensitive, ELISA-based immunoassays through all stages of product development, including screening, optimization, feasibility, and validation. This involves meticulous planning, design, and execution of laboratory work related to antibody selection, reagent conjugation, buffer optimization, and assay validation across various sample matrices for research and clinical applications.Conduct in-depth scientific research on immunoassay design and troubleshooting methodologies, focusing on factors such as dynamic range, limit of detection, spike and recovery, precision, accuracy, and assay linearity. Utilize Design of Experiments (DOE) and data analysis techniques to adhere to project timelines.Compile, document, and critically assess reports throughout the assay development process in preparation for product launches.Collaborate with cross-functional teams to create marketing collateral, internal reports, conference presentations, and posters, leveraging data from immunoassay development.Provide mentorship to junior scientists and offer strategic guidance on ongoing projects.

Nov 18, 2025

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Lead Principal Software Reverse Engineer

Systems Technology Research

Full-time|$204K/yr - $284K/yr|On-site|Woburn, MA

Systems Technology Research (STR) is seeking a Lead Principal Software Reverse Engineer with a deep passion for investigating and analyzing vulnerabilities within cyber-physical systems. Join a dynamic and multidisciplinary team of researchers and engineers focused on pioneering technologies that make a substantial impact on national security. This role provides a unique opportunity to work at the intersection of computing and physical systems. We value the diverse skills, experiences, and perspectives that each employee brings, which are crucial for delivering innovative solutions to our clients. Note: This position requires onsite work and an Active Top Secret (TS) clearance.

Mar 6, 2026

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Drinking Water Treatment Process Engineer

Apex Companies, LLC

Full-time|$62K/yr - $100K/yr|Hybrid|Hybrid; Woburn, MA

Are you a driven and diligent engineer looking to make a significant impact in the water treatment sector? Join Apex Companies, a dynamic consulting and engineering firm committed to your professional growth and development!Apex Companies is recognized as one of the fastest-growing engineering and environmental consulting firms in the United States, fueled by impressive sales, outstanding client retention, strategic acquisitions, and an entrepreneurial mindset. We take pride in our exceptional service and have received numerous accolades for our project excellence. As we continue to expand, we invite you to grow alongside us.Our Northeast Division boasts a stellar reputation, offering career development, training, and mentorship while engaging in diverse projects across civil, environmental, water resources, and traffic/transportation domains within a fast-paced and rewarding environment.We are in search of a meticulous Drinking Water Treatment Process Engineer to enhance our water projects in the Northeast region. This role can be fulfilled from any of our offices in Massachusetts or Rhode Island, and offers a hybrid work schedule. The successful candidate will provide design and engineering support for various water supply and treatment ventures, including new groundwater and surface water treatment plants, pump/booster stations, and upgrades to existing facilities. Our Process Engineers are involved in all aspects of the process, from initial project conceptualization and planning to facility startups and optimization.

Mar 5, 2026

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Civil Engineering Project Manager - Wastewater

Apex Companies

Full-time|$95K/yr - $160K/yr|Hybrid|Hybrid; Woburn, MA

Join a dynamic and innovative consulting and engineering firm that prioritizes growth and professional development. Apex Companies is on the lookout for a motivated Civil Engineering Project Manager who is passionate about wastewater infrastructure projects.As one of the fastest growing engineering and environmental consulting firms in the United States, Apex Companies prides itself on its remarkable client retention, entrepreneurial spirit, and award-winning project excellence. We are committed to delivering top-notch service to our clients and fostering an environment where our employees can thrive and advance their careers.Important: This role focuses specifically on managing Civil Engineering design projects related to wastewater infrastructure. Candidates with backgrounds in IT, software, or other types of project management will not be suited for this position.Apex's Northeast Division boasts a talented team engaged in diverse civil, environmental, water resources, and transportation projects, all while emphasizing career growth, training, and mentorship.We are seeking a skilled Civil Engineering Project Manager to spearhead municipal wastewater infrastructure projects across New England. This is a hybrid position that allows for flexibility in working from any of our New England offices or from a remote location, provided you are able to travel frequently to client sites within the region. A sign-on bonus is available, and we are open to considering relocation for the right candidate.

Mar 19, 2026

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Principal Program Manager

System Technologies Research (STR)

Full-time|$188K/yr - $250K/yr|On-site|Woburn, MA

Join Our Innovative Team at Systems Technology ResearchThe Sensors Division at Systems Technology Research (STR) is at the forefront of developing cutting-edge sensor technologies that bolster national security. We specialize in a diverse array of applications including airborne, spaceborne, and surface-based radar systems, electronic warfare, underwater acoustics, hyperspectral imaging, and electro-optical/infrared (EO/IR) sensing. Our interdisciplinary efforts encompass various technical domains such as RF analog/digital hardware, acoustic technologies, advanced signal processing algorithms, machine learning, systems analysis, and real-time embedded processing.The Algorithms, Processing, and Experimentation (APEX) Group is dedicated to innovating RF/radar modes, applications, and advanced signal processing techniques. We aim to transition these technologies into practical applications for RF systems, specifically tailored to meet the nuanced needs of our Defense partners (e.g., Air Force, Space Force, Navy, DARPA) and the Intelligence Community.Your Role as Principal Program Manager:We are seeking a dynamic and experienced Program Manager, ideally with a background in RF sensing systems, system integration, and advanced engineering. In this pivotal role, you will leverage your expertise to initiate and manage a diverse portfolio of programs in a fast-paced acquisition environment focused on swift, impactful, and agile solutions. Your strengths in leading geographically dispersed, multi-disciplinary teams, engaging with senior leadership, and fostering a collaborative work atmosphere will be critical to your success. You will demonstrate a comprehensive proficiency in program management and system integration.Key Responsibilities:Develop and oversee a portfolio of programs dedicated to mode development and integration within RF sensing systems.Manage multiple programs effectively, balancing cost, schedule, and technical requirements while tracking performance metrics.Lead proposal writing and capture initiatives, ensuring high-quality submissions through effective team collaboration and adherence to proposal processes.Formulate strategies to introduce mode innovations to new government and industry clients while safeguarding intellectual property.Create statements of work for subcontractors and supervise their execution to ensure compliance with project goals.Provide regular updates and program briefs to Group and Division leadership.Cultivate a collaborative work environment emphasizing clear communication and teamwork.

Jan 27, 2026

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Senior Associate - Strategic Finance and FP&A

Unison Infrastructure

Full-time|$200/yr - $200/yr|Hybrid|300 Trade Center Suite 2460, Woburn, MA 01801

Join Unison Infrastructure, a leading global investment firm specializing in telecom and renewable energy infrastructure since 2003. With ownership of over 2,200 sites and facilities that host critical wireless and telecom transmission assets as well as renewable energy projects across the United States and Europe, we are experiencing significant growth. We are looking for passionate and talented individuals to join our expanding team and contribute to our mission of delivering innovative investment solutions.

Mar 16, 2026

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Senior Tracking Algorithm Developer

Systems Technology Research

Full-time|$134K/yr - $184K/yr|On-site|Woburn, MA

About Our Team At Systems Technology Research (STR), our Analytics & C2 Division is dedicated to pioneering innovative technologies that address complex national security challenges through advanced analytics. Our team is composed of enthusiastic and highly skilled engineers and scientists holding advanced degrees in fields such as engineering, computer science, mathematics, physics, and data science. Together, we leverage our expertise and creativity to transform groundbreaking concepts into fully realized implementations, enhancing the success of our clients' missions. The Signals Exploitation and Tracking (SET) Group within the Analytics Division specializes in utilizing machine learning, statistical methods, estimation techniques, and information theory algorithms to excel in target tracking, signals exploitation, and effective resource management. Your Role As a Senior Algorithm Developer, you will spearhead the development of cutting-edge technologies aimed at advancing target tracking and predictive capabilities. Your responsibilities will include creating and executing algorithms, designing and conducting comprehensive experiments and analyses, collaborating with interdisciplinary project teams, and engaging directly with clients. You'll work with intriguing datasets, devise innovative algorithmic methodologies, and tackle significant, unique challenges for our clients. This position is primarily based in our Woburn, MA office, and we invite you to join our team on-site.

Feb 24, 2026

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Vice President of Engineering

Veir

Full-time|$225K/yr - $250K/yr|On-site|Woburn, Massachusetts, United States

Why Choose Veir?At Veir, we are pioneering the future of compact, efficient, high-power, and long-distance power delivery solutions. Our innovative superconducting technologies are designed to eliminate bottlenecks across the entire electricity value chain, from generation to data center server racks. Our low voltage superconducting solutions are transforming power delivery architectures in the largest data centers around the globe. In addition, our high voltage solutions are set to revolutionize electricity transmission and distribution systems.

Mar 9, 2026

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Senior HVAC and Plumbing Mechanical Estimator

Corporate Mechanical, LLC

Full-time|On-site|Woburn Massachusetts United States

Join Corporate Mechanical, LLC, a leader in delivering outstanding HVAC and plumbing solutions with a commitment to quality and customer satisfaction. We pride ourselves on creating an enriching environment where employees can thrive, develop their skills, and contribute positively to our community.At Corporate Mechanical, we value and recognize hard work. If you seek a career that offers more than just a job and a chance to make a significant impact, we encourage you to apply today!We are actively looking for a seasoned Senior Mechanical Estimator to enhance our HVAC and Plumbing division at Corporate Mechanical of New England. This role involves meticulously evaluating bid specifications and drawings to ensure compliance and successful submission of construction bids. The ideal candidate will effectively communicate with subcontractors and internal teams to ensure accuracy in budgets and bid submissions. This position is based in Woburn, Massachusetts.Key Responsibilities:Prepare and manage plan reproduction statusMaintain open communication with subcontractors and vendorsCompile and distribute subcontractor bid packagesTransmit bid addenda and related materials to subcontractorsEnsure full subcontractor coverage on bid dayContact supply houses for additional subcontractor bidsUtilize creativity to secure competitive pricing from subcontractorsGuarantee 100% bid and budget submission by the deadlineInput all relevant data into Quickpen and Timberline softwareThoroughly review bid requirements and follow up with inquiriesUnderstand the scope of work for assigned tradesDevelop RFIs and clarifications for subcontractor coverageConduct comprehensive bid day analysis for specific tradesAlign subcontractor capabilities with project size and scopeCreate bid lists relevant to project specificationsMinimize exclusions through diligent researchIncorporate value-engineering ideas into every bidRegularly follow up on submitted bids and budgets with architects and construction managers.

Feb 28, 2026

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Scientist/Senior Scientist in Immunoassay Product Development

Spear Bio

Full-time|On-site|Woburn Office

Spear Bio, established in 2021, is an innovative and well-capitalized biotechnology startup based in Woburn, Massachusetts. Our cutting-edge technology, Successive Proximity Extension Amplification Reaction (SPEAR), represents a groundbreaking wash-free immunoassay platform that delivers unmatched sensitivity. We are committed to transforming early disease diagnosis and monitoring, providing scalable and ultra-sensitive solutions that achieve unparalleled accuracy in detecting low-abundance biomarkers, thereby empowering clinicians and researchers to enhance patient outcomes and drive global health advancements.We are currently seeking a Scientist or Senior Scientist with a robust background in immunoassay Product and Process Development. The ideal candidate will be instrumental in the development, optimization, and commercialization of next-generation immunoassay products and processes. As a subject matter expert, you will address assay troubleshooting, drive continuous improvement, and ensure the robustness, reproducibility, and scalability of Spear Bio's offerings.

Jan 26, 2026

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Software Reverse Engineer

System Technologies Research (STR)

Full-time|$112K/yr - $154K/yr|On-site|Woburn, MA

Join our dynamic team at Systems Technology Research (STR) as a passionate Software Reverse Engineer, dedicated to researching and analyzing vulnerabilities in cyber-physical systems. This role requires onsite presence in Woburn, MA. As a Software Reverse Engineer, you will: - Conduct reverse engineering on complex software and firmware, including Windows/Linux binaries as well as embedded systems on unconventional architectures. - Develop and implement automated reverse engineering and binary analysis tools to uncover protocols, interfaces, and functionalities of target systems. - Innovate and create cutting-edge cybersecurity solutions alongside multi-disciplinary teams tackling diverse technological challenges. - Engage in vulnerability weaponization, exploit development, payload crafting, and mitigation strategies for various complex targets. - Document and present your research findings effectively, contributing to solutions that enhance national security.

Jan 27, 2026

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Lead Software Engineer

System Technologies Research (STR)

Full-time|$157K/yr - $224K/yr|On-site|Woburn, MA

Systems Technology Research (STR) is actively seeking skilled Senior Lead Software Engineers to become integral members of our innovative cyber and networking team. We are dedicated to advancing cutting-edge technologies that significantly enhance national security. Our team is at the forefront of communications technology, operating across all networking layers, from the physical to the application layer. We embrace a diverse range of skills, experiences, and perspectives that are essential for delivering exceptional solutions to our clients. If you possess a proven track record of developing impactful software solutions and meet the qualifications listed below, we invite you to apply! Position Overview: The ideal candidate will have several years of hands-on experience in software engineering, integration, testing, and a solid understanding of networking concepts and protocols. You will exhibit a strong ability to take charge of technical challenges and deliver results in a collaborative, fast-paced environment. A deep comprehension of computer science principles, robust software engineering practices, and practical experience with Linux systems is crucial. At STR, experienced engineers are expected to work autonomously and contribute significantly to team initiatives while mentoring junior members. This position offers an exciting opportunity to work in a dynamic, high-profile development environment alongside a diverse and talented team. In this leadership role, you will design, implement, and test software solutions that enhance advanced real-time data communications and networking systems through open systems principles. We strive for the highest quality standards in maintainability and reusability of our tools and techniques, so candidates should demonstrate the ability to create well-designed, scalable solutions and establish reliable testing methodologies.

Feb 4, 2026

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Senior Living Outpatient Occupational Therapist

BAYADA Home Health Care

Full-Time Outpatient Occupational Therapist – Senior Living CommunitiesLocation: Arlington and WoburnBAYADA Home Health Care is actively searching for a dedicated and experienced Occupational Therapist (OT) to join our team in providing exceptional outpatient therapy services through home visits within our North Boston Senior Living office. Our focus is on enhancing the quality of life for our clients residing in senior living communities (Assisted Living / Independent Living) with an immediate need in Arlington and Woburn, MA.Are you an Occupational Therapist seeking a role that offers flexibility, autonomy, and the opportunity to make a significant impact in your patients' lives? Join our mission-driven team delivering personalized therapy to residents in independent and assisted living facilities in the Arlington-Woburn area.This is your chance to practice at the top of your license without the stress of overcrowded schedules or excessive paperwork.Why You’ll Love This Role:Flexible full-time scheduleCompetitive hourly rates ranging from $45 to $50

Mar 14, 2026

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Senior Research Scientist - Machine Learning

System Technologies Research (STR)

Full-time|$134K/yr - $184K/yr|On-site|Woburn, MA

About Our TeamAt Systems Technology Research (STR), our Analytics Division is dedicated to pioneering innovative technologies that address critical national security challenges through advanced analytics. Our team is composed of passionate engineers and scientists holding advanced degrees in fields such as engineering, computer science, mathematics, physics, and data science. We leverage our expertise and creativity to transform visionary concepts into fully realized solutions, enhancing our customers' mission success.The Signals Exploitation and Tracking (SET) Group within the Analytics Division specializes in deploying machine learning, statistical methods, estimation theory, and information theory algorithms to facilitate signals exploitation, target tracking, and system resource optimization.Your RoleAs a Senior Research Scientist at STR, you will engage in the development of groundbreaking technologies centered on signals exploitation, estimation theory, resource management, and systems analysis. You will innovate cutting-edge AI/ML algorithms tailored for unique application domains, collaborate on project teams, and liaise directly with customers. Your work will involve analyzing intriguing datasets, crafting sophisticated algorithmic techniques, and addressing high-impact, unique challenges for our clients. This position is primarily based in our Woburn, MA office, and we seek a dedicated professional to join our onsite team.

Feb 5, 2026

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Principal Signal Processing Engineer (TL2)

Systems Technology Research

Full-time|$206K/yr - $284K/yr|On-site|Woburn, MA

Systems Technology Research (STR) is home to the Space Missions and Sensing (SMS) Sector, where teams focus on advancing technologies for space-based sensing, space control, and counter-sensing. The Space and Counter Space (SCS) group specializes in electronic warfare, developing both engineering and operational prototypes to demonstrate new capabilities in practical settings. Facilities include benchtop setups, anechoic chambers, and over-the-air testing environments, supporting hands-on development and evaluation. The team brings together principal investigators, program managers, signal processing experts, software developers, FPGA specialists, RF and electromagnetic engineers, and mechanical designers. Collaboration extends to research engineers, academic partners, and industry experts, all working to solve complex RF sensing and counter-sensing problems. Role overview The Principal Signal Processing Engineer (TL2) will lead efforts in algorithm and signal processing research, focusing on signal detection, classification, autonomous sensor planning, and radar electronic warfare. This position is based in Woburn, MA and involves close collaboration with clients to address their technical challenges. The role also includes guiding a team of researchers and working alongside engineering groups to optimize and demonstrate advanced system capabilities in real time. What you will do Work directly with clients to understand their operational needs and tailor solutions for national security applications. Design and implement advanced signal processing and machine learning methods for radar and RF sensing challenges. Collaborate with multidisciplinary teams to develop and deploy prototype systems. Lead and motivate diverse teams, applying technical knowledge and leadership skills to achieve project goals. Contribute to business development and proposal writing to help shape future projects.

Apr 29, 2026

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Division Finance Lead

Systems Technology Research

Full-time|On-site|Woburn, MA

Join our dynamic team at Systems Technology Research as a Division Finance Lead, where you will play a pivotal role in driving financial strategy and operations. You will be responsible for overseeing financial planning, budgeting, and analysis to support our ambitious growth objectives. Collaborate with various departments to ensure financial alignment and provide valuable insights that drive decision-making.

Apr 8, 2026

Senior Software Engineer - Integration and Testing

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