Windows System Administrator

usm2Arlington

On-site Full-time

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Experience Level

Mid to Senior

Qualifications

Proven experience as a Windows System Administrator or similar role. Strong knowledge of Windows server environments, Active Directory, and group policies. Experience with virtualization technologies such as VMware or Hyper-V. Ability to troubleshoot hardware and software issues effectively. Excellent communication and interpersonal skills. Relevant certifications (e.g., MCSA, MCSE) are a plus.

About the job

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!

About usm2

usm2 is a forward-thinking technology company dedicated to innovation and excellence. We provide cutting-edge IT solutions to our clients and foster a collaborative work environment that encourages professional growth and development.

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Windows System Administrator

usm2

Full-time|On-site|Arlington

Feb 8, 2017

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CNO Developer for Windows/Linux Systems

Two Six Technologies

Full-time|$100K/yr - $220K/yr|On-site|Arlington, Virginia; Chantilly, Virginia

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.

Feb 18, 2026

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Windows CNO Developer

M9 Solutions

Full-time|$60K/yr - $180K/yr|On-site|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.

Mar 18, 2026

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Senior Software Engineer for Windows/Desktop Applications

Speechify

Full-time|On-site|Arlington, VA, USA

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.

Apr 25, 2026

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Assistant Administrator

solidcore

Full-time|On-site|Arlington, Virginia

Join solidcore as an Assistant Administrator, where you will play a vital role in supporting our administrative team to enhance operational efficiency. In this dynamic position, you will assist with various administrative tasks, manage schedules, and facilitate communication across departments.

Apr 8, 2026

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CNE Developer (Windows) at M9 Solutions | Arlington, VA

M9 Solutions

Full-time|$60K/yr - $180K/yr|On-site|Arlington, VA

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.

Mar 19, 2026

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Senior Telephony Administrator

Aledade

Full-time|On-site|Arlington, VA

Aledade is seeking a highly skilled Senior Telephony Administrator to join our dynamic team. In this pivotal role, you will be responsible for overseeing and optimizing our telephony systems, ensuring seamless communication across our organization. Your expertise will play a crucial role in enhancing our operational efficiency and contributing to our mission of transforming healthcare.

Mar 6, 2026

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Senior Systems Engineer

Systems Technology Research

Full-time|On-site|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.

Apr 7, 2026

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Researcher in Advanced Sensor Systems

Systems Technology Research

Full-time|$110K/yr - $138K/yr|On-site|Arlington, VA

Join Our Team:The Sensors Division at Systems Technology Research (STR) is dedicated to pioneering technology for advanced sensor systems and platforms that bolster national security. Our work encompasses a diverse array of critical areas including airborne, surface, and space-based radar, electronic warfare, underwater acoustics, hyperspectral imaging, and electro-optical/infrared (EO/IR) sensing technologies. We are engaged in full system prototypes, experimental campaigns, and the development of next-gen technology components. Key technical domains include RF analog/digital hardware, acoustic hardware, signal processing algorithms, machine learning, tracking and fusion technologies, autonomous systems, and real-time embedded processor implementation.Your Role:We are seeking a skilled Researcher to become a vital part of our high-performing Systems Autonomy, Analysis, and Modeling (SAAM) Group. In this role, you will collaborate with scientists and engineers to design mission-critical scenarios, enhance complex simulation frameworks, and derive actionable insights from simulation outcomes. This position balances hands-on technical development—such as coding new functionalities and integrating models—with analytical reasoning to interpret results and effectively communicate findings to a variety of stakeholders, including program managers and senior leadership.

Apr 30, 2026

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Lead Model-Based Systems Engineer

System Technologies Research (STR)

Full-time|$157K/yr - $224K/yr|On-site|Arlington, VA

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.

Jan 27, 2026

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Cybersecurity Tools Administrator

Accenture Federal Services

Full-time|$100.2K/yr - $203.4K/yr|On-site|Arlington, VA

At Accenture Federal Services, we prioritize the mission of strengthening the U.S. federal government and enhancing the lives of its citizens. Our dedicated team of over 13,000 professionals is united in harnessing the limitless potential of technology and innovation to serve clients across various sectors, including defense, national security, public safety, civilian, and military health organizations. As part of Accenture Federal Services, a leading technology firm under the global Accenture umbrella, we have been recognized as one of Glassdoor's Top 100 Best Places to Work. We foster a collaborative and supportive environment where every individual feels valued and empowered to grow, learn, and excel through hands-on projects, certifications, and industry training. Join us on a journey to drive meaningful, enduring change that propels government missions forward! Job Description:The Cybersecurity Tools Administrator plays a vital role in proposing, developing, installing, managing, operating, maintaining, integrating, and configuring a comprehensive suite of cybersecurity tools that enhance network cybersecurity operations across various programs. These tools deliver layered protection across endpoints, peripherals, data, email, web, and networks, functioning effectively within environments such as CorpsNet, SIPRNet, cloud platforms, DMZ segments, network boundaries, and endpoint devices. This position supports defensive cyberspace operations and the complete incident response lifecycle by ensuring essential capabilities—including threat detection and prevention, traffic segmentation controls, data rights management, compliance to connect, SIEM, vulnerability scanning, and security operations infrastructure—are fully operational, finely tuned, and securely maintained.The Work:Propose, install, configure, integrate, and maintain cybersecurity tools across diverse environments (CorpsNet, SIPRNet, cloud, DMZ, boundary networks).Oversee the operation and continuous tuning of cybersecurity tools to support endpoint, network, email, data, and web protection.Monitor resource utilization and system performance, ensuring tools remain operational, efficient, and securely configured.Assist in the deployment of new cybersecurity solutions and the upgrading of existing toolsets.Maintain secure configurations, backups, and documentation for all security tools.Develop and sustain cybersecurity security plans, diagrams, and associated artifacts.Integrate SIEM data to ensure proper log and telemetry flow, aiding in threat detection and incident response.

Mar 20, 2026

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Systems Engineer at Rabot | Arlington, TX

Rabot

Full-time|On-site|Arlington, TX

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.

Mar 6, 2026

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Aug 7, 2016

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Director of Business Systems & Data Programs

solidcore

Full-time|On-site|Arlington, Virginia

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.

Apr 2, 2026

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Administrative Analyst - Contract Position

Prosidian Consulting

Contract|On-site|Arlington

Prosidian Consulting is seeking a detail-oriented Administrative Analyst for a contract position. This role entails supporting various administrative functions, ensuring efficient operations, and contributing to project management efforts. As an Administrative Analyst, you will collaborate with teams to analyze processes, identify improvements, and implement solutions that enhance workflow efficiency.

May 8, 2015

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Principal Model-Based Systems Engineer

System Technologies Research (STR)

Full-time|$206K/yr - $284K/yr|On-site|Arlington, VA

Join our innovative team at STR as a Principal Model-Based Systems Engineer (MBSE) in Arlington, VA (also available in Woburn, MA and Dayton, OH) and play a pivotal role across a diverse array of Department of Defense (DoD) mission areas. We seek a seasoned Systems Engineer with a proven track record in leading teams, architecting complex systems, and navigating the Systems Engineering Lifecycle, particularly in the realm of Digital Engineering and MBSE. You will be instrumental in supporting STR’s Systems Development Division by implementing robust processes and tools that ensure architectural integrity and traceability from requirements analysis through software development to production deployment.This role provides the unique opportunity to collaborate with leading experts in sensor development and cybersecurity, enhancing your expertise in MBSE tools and techniques. The ideal candidate will be well-versed in advanced Systems Engineering methodologies, Modeling and Simulation, and Digital Engineering/MBSE, with a passion for mentoring junior staff and nurturing the growth of subject matter expertise within the organization.As a Systems Engineer, you will not only model in SysML but also guide teams in leveraging customization and automation techniques through Cameo to ensure compliance with DoD Digital Engineering objectives. Proficiency in high-level programming languages such as C/C++, Java, or Python is highly desirable.You should have experience in implementing a rigorous MBSE approach for DoD systems development. As STR embarks on new programs, we are adopting agile methodologies that integrate model-based requirements management and traceability with software development. This position is ideal for a Systems Engineer with a software development background who is keen to enhance industry practices and showcase the benefits of MBSE.

Jan 27, 2026

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Senior Electrical and Energy Systems Engineer

Delaware Nation Industries

Full-time|On-site|Arlington, Virginia, United States

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.

Mar 25, 2026

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Application Systems Analyst III - Contract Position

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Contract|On-site|Arlington

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May 12, 2015

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Senior Business Systems Analyst at Redhorse Corporation | Arlington, VA

Redhorse Corporation

Full-time|On-site|Arlington, VA

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.

Sep 15, 2025

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Junior Corporate Accountant - In-Office Position

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Full-time|On-site|Arlington, VA

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.

Mar 1, 2026

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