Principal Systems Engineer

Principal EngineeringAPEX TK is seeking a highly skilled Principal Engineering to provide engineering oversight for target system payloads and countermeasure development. In this role, you will act as a trusted advisor to the program office, delivering critical assessments of prime contractor designs, technical plans, and target instrumentation layouts. You will serve as a technical anchor during major program milestones—from System Requirements through Product Acceptance—while seamlessly collaborating across multiple organizations, modeling teams, cost analysts, and schedulers to ensure items are delivered accurately and on time.Engineering Oversight & Design AssessmentExpert Advisory: Serve as the technical expert on payload and countermeasure requirements development, analysis, design, qualification, and fielding.Independent Evaluation: Review and provide assessments of prime contractor designs, plans, reports, and technical procedures.Instrumentation Analysis: Evaluate target instrumentation requirements, physical layouts, component selection, and testing methodologiesProgram Milestone & Lifecycle SupportMilestone Reviews: Provide technical evaluation and engineering support during all major program milestones (including SRR, PDR, CDR, TRR, FRB, MRB, and PAR).Cross-Agency Coordination: Answer technical inquiries from external MDA organizations and lead multi-disciplinary Technical Interchange Meetings (TIMs).Program Management & Operations CollaborationCost Estimation: Provide technical assessments to the cost analysis team to ensure accurate program management budget estimates.Schedule Alignment: Partner with the program scheduler to track delivery deadlines and proactively keep leadership advised of status.What Required Skills You'll BringSecurity Clearance: Active DoD Secret clearanceEducation & Experience: Master's degree in STEM and 12+ years supporting missile defense or large-scale, complex DoD programs.Program Execution: Experience managing end-to-end program lifecycles, including the development, testing, and fielding of complex systems.Adaptability: Thrive in a fast-paced environment where priorities change quickly.Multitasking: Handle multiple urgent tasks at once without losing focus.Travel: Able to support travel request up to 20% of the time.What Desired Skills You'll BringUnderstanding of IR/RCS signatures for flight objects and countermeasures.Experience with material properties and material property measurements.Knowledge of real-world threat systems and how they impact target designs.Have an understanding of MDA flight test requirements and apply that to the payload hardware development.Technical proposal development and evaluation.