Senior-Level Mechanical Engineer (Hybrid/Remote)

About the role

Amentum is seeking a Senior-Level Mechanical Engineer to support our Oak Ridge Project. The successful candidate will lead and oversee the design of HVAC, plumbing, and piping systems, coordinate with project management and other disciplines, and ensure compliance with applicable codes and standards.

Responsibilities

• Lead and oversee the design of HVAC, plumbing, and piping systems, including B31.3 process piping
• Serve as technical authority for mechanical system design within assigned project scope
• Review, approve, and check engineering calculations, layouts, specifications, and drawings
• Apply advanced engineering judgment to resolve complex design issues
• Support project planning by assisting with: Scope definition, Equipment sizing, Schedule development, Budget control for mechanical design activities
• Cookordinate mechanical designs with structural, electrical, architectural, and process disciplines
• Apply applicable codes, standards, and procedures (e.g., IMC, ASHRAE, NFPA, ASME)
• Interface with clients and other stakeholders as a senior technical contributor
• Provide senior-level support during procurement and construction phases, including review and resolve RFIs, submittals, and field issues
• Mentor and guide engineers and designers on applicable codes, standards, and best practices
• Ensure all work under your technical responsibility complies with Amentum’s engineering and quality procedures

Qualifications

• B.S. Mechanical Engineering from an ABET accredited engineering program
• 15+ years in industrial/government design of Mechanical, HVAC, Plumbing Systems, and related mechanical building systems
• Demonstrated experience delivering projects from concept through detailed design completion
• Proven ability to lead teams of engineers and designers within budget and schedule constraints
• Proficiency with discipline-specific tools such as: Carrier HAP, Trane TRACE, PipeFlo, AutoCAD, MicroStation, etc.
• Thorough knowledge of applicable codes & standards (International Mechanical Code, NFPA, ASHRAE, etc.)
• Professional Engineer (PE) license required

Preferred Qualifications

• Prior nuclear, DOE, or high-hazard facility design experience
• Experience working under a formal quality program (ISO 9001, NQA 1)
• Strong leadership, communication, and technical mentoring skills
• Demonstrated attention to detail and commitment to technical excellence
• Proficiency with Microsoft Office (Excel, Word, Outlook)

Work Environment

Primarily office-based work in a secure engineering environment. Amentum office location is preferred; hybrid or remote work may be available by prior agreement based on role and project requirements. Occasional exposure to industrial facilities, which may include elevated noise levels, hazardous materials, or controlled areas. Site visits may be required.

Physical Requirements

• Ability to sit or stand for extended periods
• Ability to lift up to 35 lbs occasionally
• Vision correctable to 20/20
• Read and use computer-aided design software effectively
• Appropriate PPE and training will be provided as required