Senior Systems Engineer – Systems Integration & Test; SEIT

About Four Sea Group, Inc.

Four Sea Group is a 100% employee-owned technical mission support company based in Denver, Colorado. Founded by an aerospace industry veteran and PhD astrophysicist, we support complex defense, space, software, systems, and mission-focused programs for government and industry partners. What sets FSG apart is the caliber of our people and the way we operate: we are a reputation-driven team of highly skilled engineers and technical experts who are brought in for their depth, judgment, and ability to solve difficult problems.

As an employee-owned company, we have built our compensation, benefits, and culture around a simple idea: when the company succeeds, that value should go back to the people doing the work.

About the role

Four Sea Group is seeking a Senior Systems Engineer specializing in systems integration and test to support the development, integration, verification, and validation of complex mission systems.

This role contributes to Four Sea Group’s ability to translate customer requirements into reliable fielded capabilities by connecting systems-engineering analysis with hands-on integration and verification. The engineer will independently support defined system-level efforts, evaluate hardware and software interactions, develop and execute test approaches, troubleshoot anomalous behavior, and help ensure technical solutions account for mission, schedule, cost, and lifecycle considerations.

The ideal candidate brings practical systems-engineering judgment combined with strong integration and test experience. This role requires the ability to understand how requirements flow into hardware and software solutions, evaluate system interfaces and tradeoffs, and collaborate across engineering disciplines to improve technical readiness and successful program delivery.

Required Qualifications

• Bachelor’s degree in Engineering, Systems Engineering, Computer Science, Aerospace Engineering, or another relevant technical field, or equivalent practical experience.
• Relevant systems engineering, integration, test, verification, or mission-focused engineering experience; the customer requirement allows approximately three years with a bachelor’s degree, one year with a master’s degree, or equivalent additional experience in lieu of a degree.
• Active DoD TS/SCI security clearance at the time of application.
• Experience supporting system integration, verification, validation, or system-level test activities.
• Experience translating customer or product requirements into hardware and software system solutions.
• Experience developing test plans, test procedures, checkout procedures, and technical reports.
• Experience with requirements analysis, allocation, interface definition, or comparable systems-engineering activities.
• Understanding of system/product lifecycle concepts and established engineering practices.
• Experience working with both Linux- and Windows-based systems.
• Experience installing or supporting software using Docker.
• Experience collecting and evaluating test or instrumentation data.
• Experience troubleshooting anomalous behavior involving both hardware and software.
• Experience with Jira, Confluence, or comparable engineering collaboration and issue-tracking tools.
• Working proficiency with standard Microsoft Office tools, including Excel, Word, PowerPoint, and Project.
• Ability to independently support a defined systems integration and test scope and coordinate effectively across hardware, software, and test teams.
• Ability and willingness to travel internationally for approximately 7–14 days at a time, up to approximately 20% annually.
• Strong written and verbal communication skills.

Preferred Qualifications

• Experience performing functional analysis, timeline analysis, detailed trade…