TITLE: Systems Test Engineer
LOCATION: Sterling, VA
CLEARANCE REQUIRED: Active DoD TS/SCI with CI Polygraph
EMPLOYMENT TYPE: Full-time, Onsite
POSITION SUMMARYModern Government Solutions (MGS) is seeking a Systems Test Engineer to plan, execute, and validate the performance, reliability, and security of mission-critical systems supporting national 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.
PREFERRED 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 citizens and may be subject to a government security investigation for access to classified information.*
