Mid-Level Mechanical Engineer (HVAC, Plumbing, Piping)

About the role

Amentum Nuclear Projects, a Tier 1 services provider for the U.S. Department of Energy, the National Nuclear Security Administration (NNSA) and commercial nuclear companies, is looking for a Mid-Level Mechanical Engineer based in Oak Ridge, Tennessee. The engineer acts as a technical leader for building mechanical systems on large-scale nuclear projects, overseeing HVAC, plumbing and piping designs and leading mechanical engineering teams. The work is primarily office-based in a secure engineering environment, with occasional site visits.

Key responsibilities

• Design HVAC, plumbing and piping systems, including B31.3 process piping
• Serve as technical authority for mechanical system design within the assigned project scope
• Review, approve and check engineering calculations, layouts, specifications and drawings
• Resolve complex design issues using sound engineering judgment
• Assist with scope definition, equipment sizing, schedule development and budget control for mechanical design
• Coordinate mechanical designs with structural, electrical, architectural and process disciplines
• Apply codes and standards such as IMC, ASHRAE, NFPA and ASME
• Interface with clients and stakeholders as a senior technical contributor
• Support procurement and construction by reviewing and resolving RFIs, submittals and field issues
• Mentor engineers and designers on codes, standards and best practices

Required profile

• B.S. in Mechanical Engineering from an ABET-accredited program
• 5+ years in industrial/government design of mechanical, HVAC and plumbing systems
• Experience delivering projects from concept through detailed design
• Proven ability to lead engineering teams within budget and schedule
• Knowledge of International Mechanical Code, NFPA, ASHRAE and similar standards
• U.S. citizenship, valid driver's license, ability to obtain and hold a security clearance, and willingness to undergo background investigation and drug screening
• Ability to sit or stand for long periods, lift up to 35 lbs occasionally, and read CAD software; PPE and training provided as required

Required skills

• Carrier HAP, Trane TRACE, PipeFlo, AutoCAD, MicroStation
• Preferred: PE license, nuclear/DOE/high-hazard facility experience, ISO 9001/NQA 1 quality program experience, Microsoft Office

What we offer

• Estimated pay of $80,000-$130,000
• Health, dental and vision insurance, paid time off and holidays
• Retirement benefits including 401(k) matching, educational reimbursement, parental leave
• Employee stock purchase plan, tax-saving options, disability and life insurance, pet insurance