Senior-Level Mechanical Engineer (Hybrid/Remote)

Amentum•Oak Ridge, TN

20h•Hybrid

About The Position

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 currently seeking a Senior-Level Mechanical Engineer to support our Oak Ridge Project. As a senior-level mechanical engineer, you will serve as a technical leader responsible for the design, coordination, and delivery of building mechanical systems for industrial and government facilities. This role includes oversight of HVAC, plumbing, and piping system designs; leadership of mechanical engineering teams; and accountability for technical quality and compliance throughout the project lifecycle. The successful candidate will work closely with project management, discipline leads, and clients to deliver fully coordinated, code‑compliant, and high‑quality engineering solutions in accordance with Amentum’s established quality procedures.

Requirements

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
U.S. Citizenship required (no dual citizenship)
Valid driver's license is required
Ability to obtain and maintain a security clearance
Ability to pass pre-employment background investigation and drug screening
Willingness to work overtime or outside normal hours as needed
Professional appearance appropriate for a customer‑facing engineering environment
Travel required: less than 10%

Nice To Haves

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)

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
Coordinate 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