Principal Model-Based Systems Engineer

At Two Six Technologies, we are at the forefront of technology innovation, developing and deploying cutting-edge products that address some of the world's most complex challenges. Through unparalleled collaboration and steadfast trust, we push the limits of what is achievable, empowering our team and assisting our clients in creating a safer global future.We are on the lookout for skilled Windows and Linux CNO developers. Our CNO initiatives are mission-driven, focused on providing solutions to challenging and enduring targets in demanding environments. Our teams specializing in vulnerability research and development consistently deliver results across diverse devices and platforms. Candidates should possess substantial software development experience, along with a profound understanding of exploitation and attack mission scenarios, and be comfortable supporting rapid capability development events.Work locations include Chantilly, VA, Herndon, VA, or Arlington, VA.

M9 Solutions is committed to delivering exceptional IT services and solutions to the Federal Government. We mobilize the right talent, skills, clearance levels, and technologies to assist organizations in achieving enhanced performance and sustainable change. With a proven track record of providing quality IT services to over 30 Federal Agencies and numerous commercial clients nationwide, our expertise includes digital transformation, software development, cloud migration, cybersecurity, data analytics, and IT talent solutions.M9 Solutions is actively seeking an experienced Windows CNO Developer to join our team on-site in support of a government contract in Arlington, VA. An active TS/SCI clearance is mandatory for this role.Key Responsibilities:Research, identify, and analyze Windows kernel vulnerabilities, including privilege escalation, sandbox escapes, and persistence mechanisms.Design, develop, and maintain CNO/CNE tools targeting Windows platforms (both kernel and user mode) from proof-of-concept to operational-grade capabilities.Conduct advanced reverse engineering of Windows binaries, drivers, and system components to assess behavior, exploitability, and mitigation strategies using tools such as IDA Pro, Ghidra, and WinDbg.Create kernel-mode and user-mode code in C/C++ and Assembly to implement implants, loaders, and exploit chains, focusing on reliability and stealth.Develop and test exploitation techniques for complex Windows targets, including modern protection bypasses (ASLR, DEP, CFG, kernel mitigations) in collaboration with cyber research teams.Integrate CNO capabilities into mission frameworks and tasking/dataflow pipelines, ensuring configuration, logging, and secure communications.Execute debugging and troubleshooting of low-level software in lab and operational-like environments, including crash triage and performance analysis.Work closely with analysts, operators, and other engineers to ensure capabilities align with mission requirements, providing technical guidance on feasibility and trade-offs.Produce comprehensive technical documentation (designs, CONOPs, usage guides) and contribute to secure coding standards and internal best practices.

At Two Six Technologies, we engineer, implement, and deploy pioneering solutions designed to tackle some of the most intricate challenges facing the globe today. Our commitment to exceptional collaboration and steadfast trust allows us to expand the limits of what is achievable, empowering our team and aiding our clients in forging a safer future worldwide.Opportunity OverviewTwo Six Technologies is on the lookout for a Lead CNO Developer to become part of our esteemed Trusted Electronics and Effects team, which is at the forefront of an advanced telecommunications research and cyber capability development initiative.This role offers a full-time, in-office opportunity located in Arlington, Virginia, where fostering close collaboration among reverse engineering, vulnerability research, and hardware teams is vital for mission success.The program has been engaged in profound technical investigations into telecommunications access mechanisms within specified systems, uncovering innovative strategies for system access beyond conventional interactions. The team is now dedicated to utilizing that research to conduct advanced reverse engineering and vulnerability research, alongside the development of operational tools and capabilities for deployment in complex, real-world scenarios.As the Lead CNO Developer, you will take on the role of the technical lead for a small yet highly skilled team of developers and researchers. Your responsibilities will include providing hands-on technical guidance, prioritizing tasks, ensuring adherence to high technical standards, and engaging directly with mission partners and stakeholders. You will be central to transforming research findings into scalable, mission-ready cyber capabilities.

At Two Six Technologies, we are dedicated to creating, deploying, and implementing cutting-edge products that address some of the world's most intricate challenges. Through exceptional teamwork and steadfast trust, we aim to extend the limits of innovation to empower our team and assist our clients in fostering a safer global environment.Overview of OpportunityTwo Six Technologies is on the lookout for a talented Senior CNO Developer to become a part of our esteemed Trusted Electronics and Effects team. This team is instrumental in supporting an advanced telecommunications research and cyber capability development program.As a full-time, on-site team member based in Arlington, Virginia, you will engage closely with professionals across reverse engineering, vulnerability research, and hardware teams, all essential for achieving mission success.This program has embarked on extensive technical research into telecommunications access methods within defined systems, identifying innovative approaches that facilitate system access without conventional interactions. Our team is now poised to leverage this research for advanced reverse engineering and vulnerability studies, as well as to develop operational tools and capabilities suitable for deployment in intricate real-world scenarios.In this pivotal role, you will collaborate with reverse engineers and vulnerability researchers to translate cutting-edge research into actionable cyber capabilities. As part of a small, highly collaborative team, you will build custom software tools and evolve innovative proofs-of-concept into robust operational solutions.

Join usm2 as a Windows System Administrator, where you will play a crucial role in managing and maintaining our Windows-based systems. You will ensure the reliability, security, and performance of our IT infrastructure while providing support to our users. If you are passionate about technology and thrive in a dynamic environment, this is the perfect opportunity for you!

M9 Solutions is committed to delivering exceptional IT services and solutions to the Federal Government. We mobilize top talent, advanced skills, and cutting-edge technologies to empower organizations striving for enhanced performance and sustainable transformation. With a track record of providing quality IT services to over 30 Federal Agencies and various commercial clients across the nation, our expertise spans digital transformation, software development, cloud migration, cybersecurity, data analytics, and IT talent sourcing. M9 Solutions is currently seeking a CNE Developer (Windows) to join our team in Arlington, VA, as part of a government contract. An active TS/SCI with Full Scope Polygraph clearance is mandatory for this role.

Speechify is hiring a Senior Software Engineer to focus on Windows and desktop applications at its Arlington, VA office. This role centers on building technology that supports accessibility and user experience. Role overview This position involves designing, developing, and maintaining software for Windows and desktop platforms. The work emphasizes reliability, maintainability, and usability. What you will do Design, build, and support Windows and desktop software Collaborate with engineering, product, and design teams to deliver accessible, user-friendly applications Apply established software engineering principles to ensure solutions are reliable and easy to maintain About Speechify Speechify creates tools that make technology more accessible and improve user experience. The team values collaboration and a commitment to high-quality engineering.

About the TeamThe Analytics & C2 (AC2) Division at Systems Technology Research (STR) is dedicated to developing groundbreaking technologies that address complex national security challenges through advanced analytics, sense-making, and autonomy solutions. Our team is composed of enthusiastic and skilled professionals with diverse backgrounds in engineering, computer science, mathematics, physics, and data science. We leverage our collective expertise and innovative thinking to evolve ideas from initial conception to full-scale implementation, thereby enhancing mission success for our clients.The Collaborative Autonomy and Controls (CAC) Group within the AC2 Division focuses on creating multi-agent autonomous systems capable of executing multiple missions across various operational environments. Utilizing our proficiency in machine learning, advanced algorithms, and best practices in software development, we craft technologies that revolutionize reconnaissance, tactical operations, and other mission-critical areas.The Role:As a Chief Engineer, you will collaborate closely with leadership in the CAC group to conceptualize, market, and secure programs that propel the group’s technology advancements. You will lead cohesive teams to design, develop, implement, and showcase cutting-edge systems. Your responsibilities will include developing system architectures and implementation strategies for program technologies, engaging with customers to define problems, ideate solutions, and integrate concepts into broader capability ecosystems. You will work with a diverse array of customers, tackling various challenges across technology domains and engineering disciplines, while conducting software architecture and design reviews as part of our agile development process.This position offers the flexibility of STR’s hybrid work environment, allowing for remote work when physical presence at STR’s facilities is not necessary.

Join ARSIEM CorporationAt ARSIEM Corporation, we pride ourselves on building trusted partnerships with our government clients. We offer unparalleled support to various agencies across the United States Government, driven by a committed team of experienced professionals dedicated to excellence.As we expand to meet growing demand, ARSIEM continues to deliver innovative technical solutions that provide exceptional value to our clients. This translates to a career filled with opportunities for professional growth and the chance to make a significant difference in the lives of those we serve.We are actively seeking a Lab Manager II for our Technical Engagement Network (TEN). The ideal candidate will possess strong expertise as a Linux Systems Administrator, driving the design, development, and deployment of cutting-edge cybersecurity capabilities within the customer environment, thus supporting analysts and ensuring business continuity for our client’s mission. This role is based in Arlington, VA.

Systems Technology Research is seeking a talented and experienced Senior Systems Engineer to join our dynamic team in Arlington, VA. In this role, you will be responsible for designing, implementing, and optimizing complex systems and solutions that meet our clients' needs. You will collaborate with cross-functional teams and leverage your expertise to drive innovation and enhance system performance.

STR is actively seeking a Senior Lead Model-Based Systems Engineer (MBSE) to join our dynamic team in Arlington, VA. This pivotal role involves engaging with a diverse range of Department of Defense (DoD) mission areas, where you will leverage your expertise in systems architecture and the Systems Engineering Lifecycle. The ideal candidate will possess a profound understanding of Systems Engineering principles, reverse engineering techniques, and the capacity to navigate complex software systems. Your contributions will enhance architectural integrity and ensure traceability from requirements analysis to system and software development, culminating in successful production deployment. This role offers an exceptional opportunity to collaborate with leading experts in national security, tackling some of the most pressing challenges in the field. You will be part of a passionate team composed of professionals with backgrounds in engineering, computer science, mathematics, physics, and data science, committed to continuous growth and innovation in MBSE practices.

About RabotRabot specializes in developing cutting-edge vision AI solutions tailored for warehouse packing operations. Our innovative system utilizes cameras to monitor packing lines, while our advanced software identifies inefficiencies and provides operators with real-time feedback, significantly enhancing productivity. Our clients value the measurable improvements we bring to their operations.As a venture-backed organization with partnerships among leading industry players, our proven product is ready for further development. We are seeking talented engineers to advance our real-time systems to the next level.The RoleIn this role, you will be responsible for developing and optimizing the software that powers our hardware systems. This includes managing the real-time pipeline involving cameras, on-device AI models, video processing, and edge computing, creating a seamless interface between the physical environment and our AI technology.You will collaborate closely with our hardware engineering team to enhance the entire perception and processing stack. Your focus will be on ensuring low latency and high reliability, as these systems operate in dynamic warehouse environments rather than controlled data centers.Candidates should possess a minimum of 3 years of relevant experience. We prioritize your achievements and the performance of your projects over the specific companies where you have worked.This position is based in Arlington, TX and is not available for remote work.

As the Director of Business Systems & Data Programs at solidcore, you will spearhead the strategy, planning, and execution of our essential business systems and data infrastructure, which are vital for enhancing client experience, optimizing revenue operations, and driving growth. Reporting directly to the Senior Director of Digital, this pivotal role is embedded within our Digital team and is crucial for ensuring our platforms, integrations, and data flows are architected to scale effectively with our business, accommodating new initiatives across various markets and revenue streams.This role encompasses ownership of key business systems, including Mindbody and associated integrations. You will collaborate extensively with teams across Marketing, Lifecycle, Finance, Strategy & Insights, and Engineering to ensure our systems and data align with overarching business objectives. Additionally, you will lead cross-functional program management for major projects, guaranteeing that new capabilities are developed with clean system design and robust data foundations from the outset.This is a dynamic role focused on building and scaling operations, enhancing both client and operator experiences, and ensuring that our systems and data are poised to support the next evolution of our business.

Delaware Nation Industries is on the lookout for an accomplished Senior Electrical and Energy Systems Engineer to spearhead the design, optimization, and seamless integration of cutting-edge energy solutions across both utility-scale and distributed energy systems. This pivotal role demands extensive expertise in electrical engineering, energy management, renewable energy technologies, and utility operations. The successful candidate will be instrumental in shaping technical strategy, advancing grid modernization efforts, and delivering dependable, efficient, and sustainable energy solutions.Oversee the design, analysis, and implementation of electrical systems for innovative renewable energy projects, including solar, wind, storage, and microgrids.Develop and enhance Energy Management Systems (EMS) to boost efficiency, reliability, and cost-effectiveness.Collaborate with utility stakeholders to ensure adherence to grid interconnection requirements, standards, and regulations.Conduct comprehensive power system studies, encompassing load flow, short-circuit, protection coordination, and stability analysis.Facilitate grid integration of distributed energy resources (DERs), such as battery storage and demand response systems.Provide technical leadership to cross-functional teams, mentoring junior engineers and steering project execution.Assess emerging technologies and propose solutions that align with decarbonization and grid modernization objectives.Guarantee compliance with industry standards (IEEE, NEC, NERC, FERC, etc.).Lead troubleshooting and root cause analysis for complex electrical and energy system challenges.Contribute to business development initiatives, including proposal development and client engagement.

We are seeking a highly skilled Application Systems Analyst III to join our dynamic team on a contract basis. In this role, you will play a pivotal part in analyzing and enhancing our application systems, ensuring optimal performance and user satisfaction. You will collaborate with cross-functional teams to gather requirements, design solutions, and implement improvements. Your expertise will be crucial in troubleshooting issues and providing technical support to users.

About the OrganizationJoin Redhorse Corporation at an exciting time as we expand our efforts in providing innovative data insights and technological solutions that support missions critical to the United States' national interests. We seek dedicated and skilled professionals who excel in creating technology-agnostic solutions while partnering with our clients to tackle significant challenges.About the RoleWe are looking for an accomplished Senior Business Systems Analyst to play an essential role in enhancing and supporting the Federal Bureau of Investigation's national security systems. This pivotal position allows you to make a direct impact on our nation’s security infrastructure by leading mission-critical projects related to the Foreign Intelligence Surveillance Act (FISA), National Security Letters (NSL), and National Disaster Recovery Response (NDRR) systems. As a vital team member, you will ensure that these systems are secure, efficient, and aligned with the latest technological advancements. This high-impact role offers a unique opportunity to leverage your expertise in safeguarding national security.

About Chinook Systems, Inc.Chinook Systems, Inc. stands at the forefront of providing lifecycle energy security solutions tailored for mission-critical government and commercial facilities. We excel in the engineering, construction, commissioning, and operation of intelligent, cyber-secure, code-compliant, and energy-efficient building systems. Our innovative solutions are designed to significantly reduce utility costs, lower environmental emissions, and protect facilities from cyber threats. Join us to be part of a dynamic, entrepreneurial, and collaborative team that is driving progress in energy security. Your Role: As a Junior Corporate Accountant, you will collaborate with various corporate departments and the Technical Services teams to deliver essential accounting support on a daily basis. Your responsibilities will include ensuring compliance with accounting regulations, corporate policies, and contract requirements. You will actively participate in developing and implementing best practice policies and procedures aimed at optimizing cash flow and ensuring precise reporting of accounting transactions. Primary Responsibilities: Review vendor invoices for necessary documentation and approvals before processing in the ERP system.Verify and record all expense reports, ensuring adherence to company policies and compliance with contract stipulations.Manage check runs, wire transfers, and ACH transactions efficiently.Demonstrate reliability, curiosity, and a quick learning aptitude.Assist in preparing journal entries for the General Ledger.Facilitate month-end closing through transaction analysis and reconciliation with the General Ledger and related subledgers.Allocate expenses accurately in accordance with company policies, GAAP, DCAA, and FAR guidelines.Oversee vendor administration tasks, including onboarding and updates.Communicate complex technical information clearly, both in writing and verbally, across various platforms.Conduct monthly reviews of AP Aging and provide analytical insights to the Director of Finance and Administration.Process AP reconciliations, including bank, payroll, and credit card reconciliations.Support all month-end, quarter-end, and year-end close activities.Manage all AP functions, including payroll and vendor payments with a strong attention to detail.Assist in project setup tasks.Contribute to internal and external audits as needed.Perform additional duties as assigned.

ProSidian is actively seeking a dynamic Lead Instructional Systems Designer (ISD) / Project Manager to join our Technical Training and Development Division (TTDV). This role involves providing expert program support on a contract basis, primarily serving the Washington Metropolitan Area Transit Authority (WMATA) across the Mid-Atlantic region. This exciting opportunity is located in Arlington, Virginia, with work generally performed on-site.As a key contributor within our Government and Public Services sector, you will lead innovative learning solutions that enhance workforce performance and contribute to operational excellence. You will be responsible for managing multiple projects, ensuring quality, and engaging stakeholders effectively while driving the evolution of workforce learning through modern instructional design.

About UsEnnoble Care is a leading provider of mobile primary, palliative, and hospice care, serving patients across New York, New Jersey, Maryland, DC, Virginia, Oklahoma, Kansas, Pennsylvania, and Georgia. Our dedicated clinicians visit patients in their homes, ensuring continuity of care for those with chronic illnesses and limited mobility. We offer diverse programs, including remote patient monitoring, behavioral health management, and chronic care management, to deliver top-notch care from a trusted team. Join us in making a significant impact, as we live by our motto: “To Care is an Honor.” OverviewWe are in search of an Associate Director of Communications Systems who will be responsible for the performance and optimization of our communication platforms (Dialpad) and CRM systems (Zoho), along with supporting tools like CallRail, Emitrr, Scribe, and Keragon. This role is critical in ensuring our systems effectively support high-performing intake and call center operations across more than 15 offices in 11 states, with accountability for key performance metrics such as call answer rates, abandonment rates, and patient satisfaction scores.This role transcends traditional systems administration; you will be evaluated on outcomes rather than just uptime. You will proactively identify and resolve performance issues, recommend solutions, and collaborate across teams, including intake supervisors, call center leads, and regional operations, to drive results. When metrics show a downward trend, you will diagnose the root causes—whether they are related to routing, training, or staffing—and take action to rectify or escalate the situation.Reporting directly to the CISO, you will also engage regularly with the COO and executive leadership. This position is based in our Arlington, VA office.Performance MetricsYou will be responsible for achieving the following KPIs:Call Answer Rate — percentage of inbound calls answered versus abandonedAbandon Rate — percentage of callers who hang up before reaching an agentAverage Speed to Answer — how quickly calls are picked upNPS / Patient Satisfaction — scores from patient feedback surveysQueue Wait Time — average and maximum time callers waitYour ResponsibilitiesSystem configuration, call routing logic, and queue designEnhancing workflow automations and CRM process efficiencyDeveloping training and documentation to minimize user errorsManaging vendor escalations and technical support