Senior Specialist, Systems Engineer - User Acceptance Tester
L3Harris Technologies
L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.
L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
Job Title: Senior Specialist, Systems Engineer – User Acceptance Tester
Job Code: 38609
Job Location: Springfield, VA (100% Onsite)
Work Schedule: 5/8 Monday-Friday
Job Description:
L3Harris Technologies currently has an opening for a User Acceptance Tester with expertise in Test and Integration for an important National Security Program.
The successful candidate will support a high performing team of Government and Contractor professionals by testing software releases to ensure they function correctly, documenting failed test cases, and documenting any changes or updates needed to existing procedures. This role is critical in maintaining the integrity and performance of our software products.
Essential Functions:
- Design, develop, and manage test cases, including traceability to requirements, user stories, etc.
- Execute software testing events using industry-accepted test tools.
- Participate in User Acceptance Testing (UAT) and Government Acceptance Testing (GGAT) exercises.
- Document and report any bugs, issues, discrepancies, or failed test cases found during testing government defect tracking tool.
- Develop/deliver test reports as well as present finding to project stakeholders.
- Able to independently develop and precisely follow test scripts with attention to detail, document findings.
- Use strong written and verbal communication skills, with experience updating senior leadership.
- Able to work independently with minimum supervision.
Qualifications:
- Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.
- Active Top Secret/SCI with CI Polygraph
- 5+ years of software integration and test experience with a focus on user acceptance testing (UAT).
- Experience developing and executing manual and automated software tests.
- Experience using industry-accepted test automation tools, such as Test Complete or Selenium.
- Experience using industry-accepted requirements repository and defect tracking tools (ex. Backlog, Bugzilla, Jira, etc.)
Preferred Additional Skills:
- Knowledge of NRO organization and operational missions.
- Relevant certification or coursework (e.g., ISTQB Certified Tester – Acceptance Testing (CT-AcT).
L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.
Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.
By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.
L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish . For information regarding your Right To Work, please click here for English or Spanish .
- ...domains in the interest of national security. Job Title: Senior Specialist, Systems Engineering – Joint Exercise Planner (Active TS/SCI with CI Poly... ...granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government...SeniorLocal areaMonday to Friday
$148.9k - $223.4k
KBR is looking for a Principal System Engineer/Enterprise Architect in Chevy Chase, MD. This role involves designing IT enterprise architecture, working closely with cross-functional teams, and contributing to national security solutions. The ideal candidate will have extensive...Senior- ...SoSA Corp is seeking experienced engineers in SIGINT systems engineering located in Fairfax, VA. The role involves analysis for SIGINT collection payloads and working on advanced technologies. Candidates must possess a BS in engineering, 5+ years of relevant experience...Senior
- Prattwhitney is seeking a Senior Principal Systems Engineer to join the Integrated Platforms team in Washington, DC. This role focuses on supporting the White House Secure Voice Network (WHSVN), ensuring its reliability and mission readiness through comprehensive engineering...Senior
- ...A leading IT solutions provider is seeking a Senior Tester focused on User Acceptance Testing (UAT). Located in McLean, VA, this role involves developing test scenarios, executing test cases, and interacting closely with business and development teams. The ideal candidate...Senior
- ...MTSI is seeking a Senior Cybersecurity Systems Engineer whose primary function will be to work with Special Access Programs (SAPs) supporting Department of Defense (DOD), Headquarters United States Air Force, and MTSI Operations.The position will provide direct security...SeniorFor contractors
- ...experience or HS diploma/equivalent and 12 years’ experience Systems Engineering experience supporting complex, integrated hardware and/or... ...of airspace safety and surveillance. As a Systems Engineer - Senior you’ll play a key role in designing, integrating, and analyzing...SeniorContract work
- ...Senior Systems Engineer Department: PMS501PSS Employment Type: Contract / Temp Location: PMS501PSS-SEAPORT-WA Description We are seeking a skilled and experienced Senior Systems Engineer to join our team. Responsibilities Provide oversight and management of contractor...SeniorContract workTemporary workFor contractors
$90.5k - $168.5k
...of national security. Job Title: Specialist, Systems Engineer – Watch Officer (Active TS/SCI w/CI Poly... ...stand-up operational briefings to senior stakeholders and mission partners.... ...citizens. In addition, applicants who accept a conditional offer of employment may...For contractorsWork at officeLocal areaMonday to FridayFlexible hoursShift work$83 - $89 per hour
...Senior Systems Engineer Location: Hybrid (needs to be within 1 hour of DMV) Compensation: $83-89/hr (Final Compensation will be dependent on experience and skillset) 6 month contract-to-hire ABOUT THE ROLE Our client is seeking a Senior Systems Engineer with over 10 years...SeniorContract work$114.6k - $252.1k
...Senior Systems Engineer (MBSE) Opportunity The MBSE Systems Engineer will be responsible for applying model‑based systems engineering (MBSE) approaches throughout the lifecycle of program solutions to ensure that design, development, and implementation meet all necessary...Senior$85.15k - $153.93k
...submarine, surface, and surveillance fleets and systems. Our work directly impacts warfighter... ...We are seeking a Lead Systems Engineer to become the requirements, capabilities,... ...specifications from sponsors, stakeholders, end user representatives, development engineers and...SeniorInterim roleLocal areaImmediate start- ...Chesapeake Search Partners is seeking a Senior Financial Planning & Analysis Specialist to join our client in Rockville, MD. This role plays a key part... ...backed environments a plus ~ Exposure to ERP or FP&A systems preferred ~ Bachelor's degree in Finance,...Senior
- Allied Title & Escrow in Arlington, VA is seeking a Lead Post Closer to manage and finalize loan packages, ensuring all transactions comply with standards. This role involves collaboration with mortgage and real estate companies and requires a detail-oriented approach ...Senior
$150k - $160k
...Senior System Safety Engineer Tetra Tech AMT is looking for a highly skilled Senior System Safety Engineer to join our growing enterprise safety... ...Interface, as requested, with management, regarding risk acceptance, SRM document approval, and other SRM-related topics...SeniorFor contractors$120k - $150k
Vosper Thornycroft Group is looking for a Mid to Senior level Systems Engineer to provide engineering support for the Conventional Prompt Strike Program in Washington, DC. The role involves supporting multiple engineering disciplines and engaging in mission planning and...Senior- ...of a highly motivated candidate to join our talented Team. Job Title: Senior Information Systems Specialist Location: Washington, DC Responsibilities: Providing user and desktop support for email system. Providing mobile device support (...Senior
- ...Location: Herndon, VA Company: Emergent Technologies Inc. POS - 424 Emergent Technologies Inc. is seeking a highly skilled Senior Systems Engineer with deep expertise in Microsoft Certificate Authority (CA), Public Key Infrastructure (PKI), and cloud technologies to join...Senior
- ...Overview Systems Planning and Analysis, Inc. (SPA) delivers high-... ...architectural assessments, systems engineering and integration, test,... ...has an immediate need for a Senior Systems Engineer. Responsibilities... ..., analysis/traceability of user requirements, architectures traceability...SeniorFull timeWork experience placementWork at officeImmediate start
$160k - $200k
Saic is looking for a SailPoint Senior Systems Engineer in Washington, DC, to enhance cybersecurity and implement identity management solutions. The role involves coordinating with external stakeholders and requires a minimum of 8 years experience, with a focus on SailPoint...Senior$168k - $240k
Belay Technologies is looking for a System Engineer to join its intel team in Maryland. The role involves applying systems engineering principles through all phases of the systems life cycle. Responsibilities include ensuring technical integrity and managing deliverables...Senior- ...GRID Networks is seeking a Senior Linux Systems Engineer with a strong background in Linux administration and common open-source tools and software to join our team. This is an on-site position. Candidates must be self-starters who enjoy working in fast-paced and dynamic...Senior
- ECS in Washington DC is looking for a Senior Systems Engineer to support a mission-focused federal IT program. This critical role involves providing systems engineering support for secure and reliable infrastructure tailored to litigation and law enforcement missions while...Senior
- Analytic Services Inc is seeking a Systems Engineer to support the architecture and lifecycle management of biometric systems for DoD environments. This role covers end‑to‑end systems engineering for secure biometric integration and compliance with cybersecurity standards...Senior
- ...MD and will relocate to another site in the National Capital Region in Summer 2026* Transform technology into opportunity: A Systems Engineer with GDIT plays a pivotal role in enhancing enterprise IT by connecting and improving systems used by agencies. The role ensures...SeniorSummer workRelocation
- A leading technology firm in Bethesda, MD, is looking for an experienced Systems Engineer to aid in planning and implementing enterprise architecture. Key responsibilities include establishing testing processes and supporting requirement management for government clients...Senior
$92.3k - $166.85k
...better-informed decisions using trusted data at scale. Leidos Digital Modernization sector is seeking an experienced Senior Cybersecurity Systems Engineer to support the delivery, enhancement, and adoption of enterprise data and analytics products used across multiple...SeniorLocal areaImmediate start$150.2k - $225.3k
A leading defense technology firm is seeking a Senior Systems Engineer in Bethesda, MD. The position focuses on strategic planning, performance management, and enterprise architecture. Candidates must possess an active TS/SCI clearance and a relevant degree with significant...Senior- Koitecc Solutions is looking for an Information Systems Security Engineer (ISSE) SME to design and implement secure information systems. Responsibilities include conducting vulnerability assessments and collaborating with multidisciplinary teams to strengthen system security...SeniorFlexible hours
- Objective Area Solutions is seeking a Senior Systems Engineer to provide systems engineering support for FAA infrastructure. This role includes responsibilities in architecture development, requirements analysis, testing, and operational support. The ideal candidate will...Senior
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Specialist, Systems Engineer - User Acceptance Tester. Be the first to apply!
- mental health specialist McLean, VA
- art specialist McLean, VA
- information technology specialist McLean, VA
- adoption specialist McLean, VA
- amazon specialist McLean, VA
- event production specialist McLean, VA
- facility management specialist McLean, VA
- assembly specialist McLean, VA
- esports specialist McLean, VA
- criminal justice specialist McLean, VA


