Systems Test Engineer IV
Fuse Integration · San Diego, California, United States · Posted Jun 3, 2026
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Who we are:
Fuse builds innovative communications, networking, and computing solutions that improve the sharing of information, video, text, and voice among operators distributed throughout the airborne, maritime, and ground environments. We are a technology firm creating in-house software, network and hardware solutions that support our noble cause of advancing warfighter capabilities with elegant, user-focused communications, networks, and software systems.
About This Role:
Fuse is seeking a Systems Test Engineer IV to lead integration, validation, and operational evaluation activities across complicated tactical communication systems. This role is responsible for reducing uncertainty through evidence generation and ensuring delivery decisions are informed by validated system behavior rather than assumptions.
Working within Fuse's Define–Design–De-risk–Deliver iterative development model, the Systems Test Engineer IV transforms mission intent, architectural hypotheses, and integration risks into structured validation strategies that produce actionable evidence. This role collaborates across software, networking, RF, cyber, hardware, and systems engineering disciplines to mature system readiness and support mission success.
Integration and test are treated as learning activities—not cleanup phases. Successful candidates will be comfortable operating in environments where architecture evolves through experimentation, progressive integration, and operational feedback.
Key Responsibilities
Define
Contribute to Design Reference Missions (DRMs) by identifying mission-critical behaviors, operational stressors, and validation objectives
Help translate mission intent into measurable system outcomes and readiness criteria
Participate in identification of mission risks, integration uncertainties, and validation priorities
Design
Lead development of validation strategies aligned to mission threads, architectural intent, and system risk posture
Define integration and operational evaluation approaches that progressively reduce uncertainty
Collaborate with Systems Engineers to ensure architectural hypotheses can be validated through evidence-producing activities
Define test objectives, success criteria, and expected system behaviors
De-risk
Lead integration, modeling, simulation, experimentation, and operational evaluation activities
Design learning-oriented integration events that validate or invalidate system-level assumptions
Identify architectural gaps, interface mismatches, and operational risks through evidence-based analysis
Evaluate expected versus observed system behavior and communicate resulting insights
Produce evidence-based assessments supporting system maturity and readiness decisions
Coordinate cross-discipline troubleshooting and root-cause analysis efforts
Drive integration learning cycles that reduce mission and architectural uncertainty
Deliver
Establish readiness criteria supporting integration and delivery decisions
Ensure validation evidence is traceable to mission intent and operational objectives
Support mission demonstrations, operational assessments, and customer-facing evaluations
Communicate system readiness, residual risk, and confidence levels to technical and program leadership
Recommend delivery readiness based on evidence generated through integration and validation activities