Senior SEIT Engineer in London

We are seeking a hardcore Systems Engineering, Integration, and Test (SEIT) Engineer to own the execution and reality-check of our true System of Systems (SoS) architecture. You own the entire Systems V for a given problem set, but your anchor is firmly planted on the "Right Side." You are not a compliance checker, a QA tester, or someone who lives entirely in spreadsheets or JAMA. You are the forcing function that brings disjointed software, hardware, and autonomy subsystems together into a singular, field-ready, system of systems capability.

Your mission is to build a "steel thread" for any given capability, the fastest path to getting a baseline, end-to-end system working in the real world, ensure it is validated for the customer’s use case, and then relentlessly iterate to make it robust. You will partner tightly with TPMs, Software Engineers (SWEs), and "Left-Side" SEs to take paper architectures and smash them into rigorous mathematical and physical reality. When the software team blames the hardware team, you are the one who steps into the SITL/HITL lab or the field, parses the logs, puts a scope on the wire, diagnoses the root cause, and drives the solution. If you thrive in high-velocity, hardware-rich environments where the ultimate metric is "execution," this is the job for you.

WHAT YOU’LL DO

• Lead the hands-on integration of complex, heterogenous hardware (legacy platforms, 3rd-party sensors, and internal products) and software.
• Prove the baseline end-to-end data flow first, then scale the complexity.
• You are the ultimate technical authority for Verification, Validation (V&V), and fielding.
• You will translate Systems Readiness Reviews (SRRs) into Systems Requirements Documents (SRDs) and SRDs into aggressive, real-world campaigns.
• Take Interface Control Documents (ICDs) and prove them on the bench and in the water.
• When a third-party "black box" doesn't play nice with our network, you are the primary investigator debugging the physical, electrical, and data boundaries.
• Act as the lead anomaly hunter.
• Conduct multidisciplinary triage across mechanical, electrical, software, and network domains during integration and field testing.
• Partner directly with TPMs (who own schedule) to balance technical risk and resource allocation.
• Feed ruthless, data-driven feedback loops back to the SWEs and Left-Side SEs to drive immediate product improvements.
• Own the execution of critical downstream milestones.
• You will write the test plans, build the Hardware-in-the-Loop (HITL) rigs, and lead the execution for readiness reviews and acceptance tests.
• Travel to the field and customer sites to lead complex operational deployments, ensuring the system transitions smoothly from R&D to operational dominance and customer success.
• Ability to travel as required for program support, proposal support, and stakeholder meetings.

REQUIRED QUALIFICATIONS

• 8+ years of rigorous Systems Engineering, Integration, and Test experience, with a heavy emphasis on the Right Side of the V (subsystem integration, HITL/SITL testing, V&V, and field execution).
• A proven track record of taking complex, multi-domain systems from the lab bench to operational environments at a breakneck pace.
• You must know how to make disparate systems talk.
• "Hands-on" DNA. You are as comfortable reading a Python script or parsing a JSON payload as you are debugging a serial connection or analyzing network traffic (Wireshark, TCP/IP, UDP).
• Demonstrated experience acting as the technical "glue" between highly specialized software, electrical, and mechanical engineering teams.
• Experience running formal customer sell-off milestones (FAT, SAT) and fielding products in unforgiving environments.
• Ability to travel 20% with potential surges above 20%.
• Must be authorized to work in the United Kingdom.

PREFERRED QUALIFICATIONS

• Experience operating, integrating, and troubleshooting complex systems in a maritime or subsea environment (acoustic sensors, underwater navigation, comms relays), but Maritime domain experience is not required.
• Proficiency in scripting and data analysis tools (Python, bash, MATLAB) to rapidly parse logs, automate test rigs, and visualize system performance in the field.
• Familiarity with Linux operating systems, RTOSes, and edge-compute architectures.
• Familiarity with building and utilizing Hardware-in-the-Loop (HITL) and Software-in-the-Loop (SITL) test infrastructures.
• Experience with subsea operational procedures, launch and recovery systems (LARS), and offshore test execution.