Sr System Test Engineer

About the role

Join our Space Systems Test & Integration team supporting the Missile Defense Space Enterprise Architecture (MDSEA). As a Senior System Test Engineer, you will provide technical leadership for verification, validation, integration, and mission readiness activities across complex satellite ground system environments. This position requires extensive hands-on experience with space-ground enterprise systems, mission system integration, IT infrastructure, test automation, and DevSecOps-aligned development pipelines. You will guide multidisciplinary engineering teams, support DT/OT test events, and ensure mission-critical systems meet stringent operational requirements.

Responsibilities

• Develop and execute system level test strategies, plans, procedures, and verification artifacts.
• Provide technical guidance that will be used by MDSEA System Engineers to ensure test standardization and performance targets are met.
• Career events, readiness reviews, operational demonstrations, and certification milestones.
• Conduct functional, integration, regression, performance, cybersecurity, and end-to-end mission system testing.
• Validate software builds, configuration changes, and modifications to enterprise satellite ground system components.
• Test IT infrastructure which includes servers, networks, storage systems, virtualized environments, and mission critical enterprise services.
• Design, develop, and maintain automated test scripts for seamless integration into a modern DevSecOps CI/CD pipeline to increase test coverage and efficiency.
• Apply familiarity with DevSecOps/DevOps pipelines to support Infrastructure as Code through automated builds, deployments, and integration workflows.
• Identify, document, and track system anomalies, lead defect triage and root cause analyses for complex system issues, and coordinate resolution across multidisciplinary engineering teams.
• Produce test reports, readiness assessments, risk summaries, and technical briefings for leadership and government stakeholders.
• Support strict configuration management, cybersecurity compliance, and test documentation quality.

Requirements

• Must have 8, or more, years of general (full-time) work experience.
• May be reduced with completion of advanced education.
• Must have 4, or more, years of directly related experience in complex enterprise IT system testing and integration, underpinned by a solid foundation in systems engineering principles.
• Must have experience with enterprise IT infrastructure (servers, networks, storage, virtualization, system services).
• Must have a demonstrated high proficiency in authoring comprehensive test plans and test cases, and leading the execution of complex test campaigns.
• Must have experience designing or executing test automation solutions.
• Must have experience coordinating across multiple vendors, engineering teams, Agile environments, and government stakeholders.
• Must have a strong understanding of requirements analysis, verification methodologies, and the Systems Engineering V model.
• Must have experience decomposing complex systems into testable components.
• Must be familiar with Agile practices and secure development workflows.

Qualifications

• Must have a DoD Secret Security Clearance.

Skills

• Strong technical leadership.
• Deep experience in system-level testing with satellite ground systems.
• The ability to coordinate across multiple vendors, engineering teams, Agile groups, and government stakeholders.
• A strong understanding of requirements analysis, verification methodologies, and the Systems Engineering V model.
• Experience decomposing complex systems into testable components.
• Familiarity with Agile practices and secure development workflows.

Benefits

Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a retirement plan (401k or local country equivalent) program. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.