Senior Mechanical Engineer

ThayerMahan•Groton, CT

1d•Onsite

About The Position

ThayerMahan, an leader and a fast-growing, mission-focused, innovative technology company in the Intelligence, Surveillance, and Reconnaissance (ISR) and Artificial Intelligence (AI) space is seeking a highly skilled and experienced Senior Mechanical Engineer to join and strengthen our growing mechanical engineering team. This role is ideal for a hands-on engineer who thrives in a fast-paced environment and is passionate about mentoring the next generation of engineers. You will play a critical role in the design, development, and deployment of marine systems while serving as a mentor and technical guide for a talented team of young engineers.

Requirements

U.S. Citizen.
Holds a security clearance or can obtain one.
B.S. or M.S. in Mechanical Engineering or related field
8+ years of professional mechanical engineering experience, preferably in robotics, ocean technology, or ruggedized field systems
Proficient in 3D CAD (Autodesk Inventor preferred), FEA, and drawing/drafting standards (ASME Y14.5)
Demonstrated success in leading technical projects or products from concept to production
Strong interpersonal skills and proven experience mentoring or training junior engineers
Comfortable with hands-on work including prototyping, machining, and field assembly/testing

Nice To Haves

Experience in marine systems, underwater vehicles, or autonomous platforms
Familiarity with environmental sealing, corrosion resistance, and material selection for harsh environments
Exposure to design for manufacturability (DFM), design for assembly (DFA), and rapid prototyping techniques
Background in multidisciplinary system integration (mechanical + electrical/software)
Prior experience in small to mid-sized companies or fast-paced R&D environments

Responsibilities

Lead the design, analysis, and testing of mechanical components and systems for marine systems.
Provide day-to-day mentorship to junior engineers, offering guidance on technical challenges, design reviews, best practices, and professional development.
Take ownership of key technical projects, from concept through deployment, ensuring technical excellence and adherence to timelines.
Work cross-functionally with electrical, software, and field operations teams to ensure cohesive system integration.
Promote and help enforce consistent design practices, file management, drawing standards, and engineering documentation across the team.
Identify opportunities to improve processes, tools, and methodologies in the engineering department.
Actively participate in prototyping, troubleshooting, and field deployments when necessary.