Mid-Level Mechanical Engineer (Hybrid/Remote)

Amentum•Oak Ridge, TN

1d•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 Mid-Level Mechanical Engineer to support our Oak Ridge Project. As a mid-level mechanical engineer, you will support and execute the design of building mechanical systems for industrial and government facilities, including HVAC, ductwork, piping, and plumbing systems. This role involves independent technical contributions, coordination with multidisciplinary teams, and adherence to Amentum’s quality and engineering procedures to deliver fully coordinated, compliant design packages. The successful candidate will perform detailed engineering design tasks, support peer reviews, and contribute to projects from concept development through construction support.

Requirements

B.S. Mechanical Engineering from an ABET accredited engineering program
5+ years in industrial/government design of Mechanical, HVAC, Plumbing Systems, and related mechanical building systems
Ability to work effectively within multidisciplinary teams to meet project budgets and schedules
Proficiency with discipline-specific tools such as: Carrier HAP, Trane TRACE, PipeFlo, AutoCAD, MicroStation, etc.
Working knowledge of applicable codes & standards (International Mechanical Code, NFPA, ASHRAE, etc.)
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

Nice To Haves

Prior nuclear, DOE, or high ‑hazard facility design experience
Experience working under a formal quality program (ISO 9001, NQA 1)
Professional Engineer (PE) license, or ability to obtain
Strong analytical, problem ‑solving, and communication skills
Self ‑motivated, detail ‑oriented, and team ‑focused professional
Proficiency with Microsoft Office (Excel, Word, Outlook)

Responsibilities

Perform and support the design of HVAC, plumbing, and piping systems, including B31.3 process piping
Develop and check: Engineering calculations
Develop and check: Equipment sizing
Develop and check: System layouts
Develop and check: Design deliverables and drawings
Coordinate mechanical designs with structural, electrical, architectural, and process disciplines
Utilize discipline ‑specific design and analysis software to support system design
Apply applicable codes, standards, and procedures (e.g., IMC, ASHRAE, NFPA, ASME)
Participate in internal design reviews and incorporate review comments
Support construction activities, including responses to RFIs and submittal reviews
Adhere to established quality assurance programs and procedures