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Submarine Senior Systems/Platform Engineer at XSITE LLC

XSITE LLC · San Diego, United States Of America · Hybrid

$125,000.00  -  $150,000.00

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Position: Submarine Senior Systems/Platform Engineer  

Location: San Diego, CA (Hybrid considered)
Clearance Requirement: Secret (TS/SCI preferred)
Employment Type: Full-time 

Position Overview 

XSITE LLC is seeking a Lead Systems Engineer / Platform Architect to set technical direction and own the architectural baseline for submarine platform capabilities at the hardware–software boundary. You’ll operate as a technical authority and chief integrator—driving requirements, architecture, and interface governance; coordinating cross-discipline teams; and serving as the primary liaison with government stakeholders and shipboard integration teams. This role emphasizes leadership, decision-making, and stakeholder alignment over hands-on implementation. 

What You’ll Do 

  • Own the technical baseline: Define and evolve CONOPS, system architecture, and interface control; maintain traceability from mission needs to verification evidence.
  • Lead integration by influence: Orchestrate HW/SW integration across labs, SIL/HIL, and shipboard environments; set entry/exit criteria and readiness gates.
  • Governance & decision-making: Chair or support design reviews (SRR/SDR/PDR/CDR), TIMs, CCBs, and technical risk boards; run trades and document decisions.
  • Requirements leadership: Establish verification strategies and allocation; ensure requirements and ICDs remain synchronized with delivered capability.
  • Stakeholder liaison: Serve as the primary technical POC with Navy customers, primes, and suppliers; align roadmaps, constraints, and test/sealift schedules.
  • Quality & reliability oversight: Direct teams building diagnostics, regression suites, and observability; ensure platform reliability and performance targets are met.
  • Digital/MBSE leadership: Guide SysML modeling, model governance, and alignment with requirements/data artifacts (e.g., DOORS/Jama ↔ Cameo/MagicDraw).
  • Cyber & networks coordination: Oversee integration for tactical networks and platform cyber posture (RMF/ATO considerations, DISA STIG/SRG alignment).
  • Plan the lifecycle: Shape the SEMP, V&V/TEMP approach, integration plans, and sustainment strategies; measure progress with meaningful technical metrics.

Note: This is a leadership/architect role. Hands-on coding or bench work is not the primary focus (though you should be able to read logs, designs, and code when needed). 

Travel: Occasional lab/shipyard/test-range events as program needs dictate. 

Required Qualifications 

  • Bachelor’s in Engineering, Computer Science, Information Systems, Applied Science, Physics, or related field.
  • 10+ years in systems/platform engineering with 5+ years leading multi-disciplinary teams or major subsystems.
  • Demonstrated ownership of system architecture, ICDs, and requirements for complex, safety- or mission-critical systems.
  • Experience leading integration and V&V across embedded devices, onboard servers, and tactical networks.
  • Proficiency with requirements management (e.g., DOORS/Jama) and MBSE/SysML practices and governance.
  • Strong communication and stakeholder management skills; proven record presenting to government customers and leadership.
  • U.S. Citizenship; Secret clearance (TS/SCI preferred).

Preferred Qualifications 

  • Undersea/maritime domain experience (submarine C5I, combat systems, edge compute).
  • Knowledge of open architecture standards (e.g., SOSA, CMOSS, OMS/UCI) and deterministic comms (MIL-STD-1553, CAN, RS-422/485).
  • Familiarity with DevSecOps/CI/CD at the platform level and enterprise/tactical networking (routing, VLANs, QoS).
  • Cybersecurity/RMF/ATO awareness (DISA STIGs/SRGs) and supply/supplier integration oversight.
  • Exposure to HIL/SIL, digital twins/simulation, and reliability engineering.

Success Looks Like 

  • A stable, scalable architectural baseline with clear, enforced interfaces and decision records.
  • Predictable integration cycles and readiness reviews that surface risks early and retire them on schedule.
  • Measurable improvements in platform reliability, performance, and deployment cadence to the Fleet.
  • High stakeholder confidence through clear communication, artifacts, and on-time technical milestones.

Why XSITE LLC? 

Best-in-Class Benefits & Work–Life Balance 

  • 100% employer-paid health, dental, and vision coverage
  • 401(k) with 6% match
  • Industry-leading PTO package
  • Continuing education reimbursement
  • Hybrid onsite/remote work environment

Stability & Long-Term Growth 

  • Prime contract holder with long-term stability
  • Mentor-Protégé JV partnership with a major defense company

Career Advancement 

  • Rapid growth (300% YoY) with opportunities for leadership and upward mobility
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