Principle Mechanical Engineer

About the role

Amentum is seeking a skilled and driven Principle Mechanical Engineer to join its engineering team in Edmonds, WA. This is a design-focused role spanning the full product lifecycle, from early concept development through hardware fabrication, installation and on-site operation. The team supports multiple US Navy research and development facilities involved in submarine weapon system development programs. The position requires a U.S. government security clearance, and US citizenship is required.

Key responsibilities

• Oversee the design, development and maintenance of mechanical systems and components to ensure performance, safety and reliability.
• Lead engineering teams in planning and executing complex projects from concept through production.
• Establish engineering standards, policies and best practices.
• Collaborate with manufacturing, quality and procurement to resolve technical challenges.
• Review and approve designs, calculations and specifications for compliance with industry codes and organizational requirements.
• Manage budgets, schedules and resources to deliver projects on time and within cost.
• Mentor junior engineers and stay informed of emerging technologies and industry trends.

Required profile

• Bachelor's degree in Mechanical or Aerospace Engineering (or similar) from an ABET-accredited institution.
• Minimum 15 years of mechanical engineering experience covering design, analysis and project lifecycle management.
• Ability to work in field environments, including industrial and outdoor settings, with travel expected around 33% of working time.
• Ability to obtain and maintain a U.S. government security clearance (US citizenship required).

Required skills

• Proficiency with CAD and solid modeling software such as SolidWorks, AutoCAD or Autodesk Inventor.
• Demonstrated experience performing structural analysis and interpreting results.
• Strong ability to read and produce engineering drawings, specifications and work procedures.
• Excellent written and verbal communication skills.
• Preferred: experience with high-pressure air and hydraulic systems (ASME/ANSI), aerospace/defense/shipboard/energy background, design review (PDR/CDR) and change control, PE license or EIT certification, vendor management and factory acceptance testing, and mentoring experience.