Systems Test Engineer - TS/SCI with CI Polygraph in Sterling

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Job DescriptionJob Description

TITLE: Systems Test Engineer

LOCATION: Sterling, VA

CLEARANCE REQUIRED: Active DoD TS/SCI with CI Polygraph

EMPLOYMENT TYPE: Full-time, Onsite

POSITION SUMMARY

Modern Government Solutions (MGS) is seeking a Systems Test Engineer to plan, execute, and validate the performance, reliability, and security of mission-critical systems supporting security operations. The ideal candidate combines strong analytical skills with hands-on experience developing and executing comprehensive test strategies across complex, integrated environments to ensure systems meet rigorous mission and accreditation requirements.

RESPONSIBILITIES (not limited to):

• Develop and execute test plans, procedures, and cases for system validation and verification in cloud-based classified information systems.
• Evaluate system performance, functionality, and interoperability across hardware, software, and network components.
• Collaborate with systems engineers, developers, and security teams to define test objectives and acceptance criteria.
• Conduct integration, regression, and performance testing to identify and resolve defects early in the lifecycle.
• Support test environment setup, configuration, and data preparation.
• Document test results, anomalies, and recommendations in support of engineering and accreditation processes.
• Participate in technical reviews, readiness assessments, and system acceptance testing.
• Provide feedback to engineering teams on design improvements and operational risks.
• Maintain traceability between requirements, test cases, and results to ensure comprehensive coverage.
• Support automation of test processes where feasible to improve efficiency and repeatability.

REQUIRED SKILLS AND QUALIFICATIONS

• Must possess an active Department of Defense (DoD) TS/SCI with CI Polygraph security clearance.
• Bachelor's degree in Engineering, Computer Science, or related field (or equivalent experience).
• Professional certifications such as ISTQB, CompTIA Security+, or equivalent.
• AWS certifications (e.g., AWS Certified Solutions Architect, SysOps Administrator, or Developer).
• 7+ years of experience in systems testing, integration, or verification within enterprise or mission environments.
• Proven experience developing and executing test plans, procedures, and reports for complex systems.
• Experience supporting system accreditation, validation, or certification efforts.
• Experience consolidating and managing test results in ServiceNow or comparable ITSM/test management platforms.
• Strong understanding of systems engineering principles, including requirements analysis and verification.
• Familiarity with test management tools, scripting, or automation frameworks.
• Familiarity with testing and validating systems within CI/CD pipelines to support automated deployment and verification.
• Familiarity with cross-domain infrastructure and testing environments supporting data transfer between security domains.
• Ability to analyze results, identify root causes, and communicate findings to technical and non-technical audiences.

SKILLS AND QUALIFICATIONS

• Experience using testing and automation tools such as Selenium, JMeter, Postman, PyTest, or Robot Framework for system and integration testing.
• Experience supporting defense or Intelligence Community (IC) programs.
• Experience running test programs within continuous integration and DevSecOps environments.
• Working knowledge of system monitoring and performance metrics.
• Experience with setting up, running and reporting in virtualized or cloud-based test environments.
• Knowledge of requirements management tools (e.g., DOORS, JIRA, or equivalent).

*Applicants selected will be United States and may be subject to a government security investigation for access to classified information.*

ABOUT US

At MGS, we believe a people-first culture corresponds to organizational success through a commitment to excellence, integrity, , and an attitude that welcomes challenges meets demands, sustains growth, and drives innovation. We provide expert mission-first technical and programmatic services and solutions for the US intelligence community, the US Department of Defense, and other governmental agencies. We create people-first organizational cultures where employees feel needed in the system, not a system that needs employees. We provide you with long-term career opportunities centrally focused on our core value system: , integrity, and a commitment to excellence.

MGS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to , , , , , , , or protected veteran status, and will not be discriminated against on the basis of .

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