Senior Mechanical Engineer

Senior Mechanical Engineer for Undersea Systems

Woburn, MA

About the Team: The Sensors Division within STR focuses on the development and analysis of advanced sensor systems in the RF, acoustic, and electro-optical domains. This includes the design and development of novel sensors and advanced information processing techniques from ideation to prototype implementations. The Subsea and Seabed Systems (SSS) Group develops and delivers advanced undersea sensor and signal processing systems, including bespoke undersea vehicles to deploy those systems.

We apply those products to to intelligence, surveillance, and reconnaissance (ISR) and counter-ISR applications to deliver missions success to our customers.

The Role:

We are seeking a Senior Mechanical / Ocean Engineer to develop technical solutions for complex, distributed uncrewed undersea systems—including vehicles, buoys, and ocean bottom nodes. In this role, you will work with high‑level guidance from a Principal Investigator or Chief Engineer, but own the detailed engineering: turning concepts into designs, prototypes, and fielded systems through analysis, fabrication, integration, and testing.

You will collaborate closely with multidisciplinary teams (mechanical, electrical, acoustics, software, systems) to realize novel system concepts for ISR and C‑ISR missions. You’ll be expected to build and apply domain expertise, proactively suggest next steps, perform peer reviews, and contribute to reports, proposals, and presentations that capture your results and ideas.

What You Will Do:

• Develop mechanical and ocean engineering solutions for distributed uncrewed undersea systems, from concept through detailed design, fabrication, integration, and test
• Lead technical tasks within small, multi‑disciplinary teams, coordinating closely with electrical, acoustics, embedded systems, and power engineers to balance complex system‑level tradeoffs
• Design and analyze key undersea structures and subsystems
  , including:
• Pressure vessels and housings for deep‑water operation
• Hydrodynamic forms and appendages
• Thermal management and power system packaging
• Shock, vibration, stability, and control aspects
• Transducer and actuator mounting and integration
• Model, analyze, and simulate electro‑mechanical, fluid, and thermal systems using custom or commercial tools (e.g., FEA, CFD, thermal analysis) to inform design decisions and predict performance
• Contribute to the design and implementation of undersea acoustic hardware prototypes
  , ensuring mechanical designs support acoustic performance, reliability, and manufacturability
• Work with teammates to model and simulate advanced undersea acoustic systems across scales—from individual sensor physics to system‑level and theater‑level behavior—providing mechanical and ocean engineering insight
• Perform peer reviews and suggest next steps for ongoing research and development activities, helping shape follow‑on tasks and programs
• Support the development of best practices and capabilities for designing, producing, integrating, and testing distributed uncrewed undersea systems; identify gaps and propose approaches to address them
• Contribute to technical communications (reports, briefings, proposals, and presentations) that summarize your designs, analyses, test results, and recommendations for customers, sponsors, and internal stakeholders

Who you are:

• Active security clearance with eligibility to support special access programs, for which U.S citizenship is needed by the U.S government
• BSwith at least 5 years of relevant experience, MS with at least 3 years of relevant experience, or PhD in Mechanical Engineering, Ocean Engineering, Physics, or a related technical discipline.
• Experience developing mechanical/ocean engineering solutions for…