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Mid-Level Mechanical Engineer (Hybrid/Remote)

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.

Description:

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.

Key Responsibilities:

• Perform and support the design of HVAC, plumbing, and piping systems, including B31.3 process piping
• Develop and check:
  • Engineering calculations
  • Equipment sizing
  • System layouts
  • Design deliverables and drawings
• Coordinate mechanical designs with structural, electrical, architectural, and process disciplines
• Utilize disciplinespecific 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

Basic Qualifications:

• 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.)

Preferred Qualifications:

In addition to the Basic Qualifications the ideal candidate might also have:

• Prior nuclear, DOE, or highhazard facility design experience
• Experience working under a formal quality program (ISO 9001, NQA 1)
• Professional Engineer (PE) license, or ability to obtain
• Strong analytical, problemsolving, and communication skills
• Selfmotivated, detailoriented, and teamfocused professional
• 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 lbsoccasionally
• Vision correctable to 20/20
• Ability to read and use computeraided design software effectively
• Appropriate PPE and training will be provided as required

Compliance & Eligibility Requirements:

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

Compensation Details:

$90,000 - $145,000

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• 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

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

04/20/2026 - Until Filled

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language atLabor Laws Posters.