Senior Mechanical Process Engineer

Amentum is a global leader in advanced engineering and innovative solutions, supporting critical missions across defense, intelligence, energy, and civilian sectors. Our people are our competitive advantage, driven by purpose, collaboration, and a commitment to delivering excellence for our customers and communities.

We are seeking a Senior Mechanical Process Engineer to join Amentum’s Advanced Solutions Group. Candidates may be based at either our Tullahoma, TN;
Farmington Hills, MI; or Greenville, SC office.

Our Advanced Solutions Group delivers the design, construction, and operation of unique and complex research and development facilities across the nuclear, automotive, motorsports, defense, and aerospace industries. Our team has supported an impressive range of clients, including Audi, Boeing, BMW, Fiat Chrysler, Ford, Honda, General Motors, NASA, the U.S. Air Force, U.S. Navy, U.S. Department of Energy, Volkswagen, and organizations throughout North America, Europe, and Asia.

Most projects involve unique and complex designs, offering the opportunity to work on a variety of challenging assignments in a dynamic, fast‑paced, and collaborative environment.

In this role, you will lead and manage projects as part of a multidisciplinary team, taking ownership from concept through execution.

• Lead project teams to develop new designs for various process systems supporting research and test facilities.
• Take ownership of the technical schedule and budget performance for assigned work.
• Independently plan, schedule, conduct, and coordinate engineering activities through the selection, adaptation, and modification of appropriate techniques, procedures, and criteria.
• Analyze project features and scope while applying sound engineering principles and best practices.
• Review results from assigned tasks and junior engineers to ensure work is complete, accurate, and properly documented.
• Develop technical reports and presentations for project management teams and clients.
• Perform formal quality checks of others’ work to ensure completeness and accuracy.
• Lead, mentor, and provide technical guidance to junior engineers.
• Collaborate closely with structural, machine design, controls and instrumentation, and aerodynamics/fluid dynamics engineers to support project objectives.
• Size and specify piping/ducting and related components, and select compressors, pumps, fans, valves, flow measurement, and fluid conditioning equipment.
• Design process and mechanical systems, including:
  • High‑pressure cryogenic and pneumatic piping systems.
  • High‑temperature systems, including steam systems.
  • Refrigeration, vacuum, and fuel systems.
  • Specialty HVAC systems and components.
• Thrive in a fast‑paced environment, meeting deadlines while maintaining high‑quality standards.
• Support the Project Manager in ongoing design and engineering efforts.
• Participate in internal and external meetings, as well as design reviews, with project teams and clients.
• Gather information, interview stakeholders, conduct studies, perform calculations, and prepare preliminary layouts and sketches as required.
• Provide installation support and supervision, collaborating with suppliers, subcontractors, and other trades both remotely and at project sites.
• Create engineering calculations and specifications and oversee the development of engineering drawings.

• US citizenship is required to comply with government customer requirements and/or applicable government regulations.
• A Bachelor of Science in Mechanical, Aerospace, or a related engineering field from an ABET‑accredited program.
• Minimum 10 Years engineering experience or 12 Years engineering experience and a MS…