Senior Mechanical Engineer

Job Description

Job Description

Job Title: Senior Mechanical Engineer

Location: Groton, CT (In-Person, Full-Time)

Department: Mechanical Engineering

Reports To: Mechanical Engineering Manager

Position Summary:

ThayerMahan , a 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.

Key Responsibilities:

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

Qualifications:

Required:

• 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

Preferred:

• 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

What we Offer:

Competitive salary, comprehensive total rewards package (medical, dental, vision, life insurance, and a 401K with employer match), and other great benefits.  Opportunity to continue to develop your career at a growing organization.  

The stated salary range represents a good-faith estimate of compensation for this role and may vary based on factors such as experience, qualifications, and geographic location.

If you meet the requirements and are ready to make waves with us, apply now! 

ThayerMahan is an Equal Opportunity Employer and doesn’t discriminate on the basis of race, color, sex, national origin, sexual orientation, gender identity, religion, age, disability, genetic information, protected veteran status, or other non-merit factor.