Early Career Mechanical Engineer

Amentum; Oak Ridge (TN); Hybrid; USD 75,000 - 115,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Tax-saving options

Disability insurance

Life insurance

Pet insurance

Job summary

Amentum is seeking an Early Career Mechanical Engineer to assist with the design and analysis of building mechanical systems for industrial and government facilities. You will support HVAC, ductwork, piping, and plumbing system design, perform calculations, and help develop drawings under senior engineers guidance.

You will collaborate with multidisciplinary teams to deliver high-quality design packages while adhering to engineering procedures and quality standards.

Qualifications

• B.S. Mechanical Engineering from ABET-accredited program.
• 0–5 years in industrial/government design of mechanical systems.
• Familiar with codes and collaboration in project teams.

Responsibilities

• Assist senior engineers with HVAC, plumbing, and piping system design.
• Perform basic engineering calculations under supervision.
• Create and revise drawings using CAD/BIM tools.
• Follow codes and quality procedures; attend meetings.

Skills

HVAC system design

Engineering calculations

Team collaboration

Attention to detail

Education

ABET-accredited B.S. in Mechanical Engineering

Tools

AutoCAD

MicroStation

Revit

SmartPlant

Carrier HAP

Trane TRACE

Job description

Early Career Mechanical Engineer

Description:

As an Early Career Mechanical Engineer you will support the design and analysis of building mechanical systems for industrial and government facilities. This role involves assisting senior engineers and project managers with HVAC, ductwork, piping, and plumbing system design, engineering calculations, drawing development, and construction support.

The successful candidate will collaborate with multidisciplinary design teams to deliver fully coordinated, high-quality design packages, while adhering to Amentum’s engineering procedures and quality standards.

Key Responsibilities:

• Assist senior engineers with the design of HVAC, plumbing, and piping systems, including B31.3 process piping
• Perform basic engineering calculations under direct supervision, such as:
  • Heating and cooling load calculations
  • Pipe and duct sizing
  • Equipment selection support
• Create and revise engineering drawings using AutoCAD, MicroStation, Revit, SmartPlant, or similar drafting tools.
• Apply applicable codes, standards, and procedures (e.g., IMC, ASHRAE, NFPA, ASME)
• Attend project meetings and training sessions as required
• Maintain organized project files, drawings, and documentation
• Follow established quality assurance programs and procedures

Basic Qualifications:

• B.S. Mechanical Engineering from an ABET accredited engineering program.
• 0 to 5 years in industrial/government design of Mechanical, HVAC, Plumbing Systems, and related mechanical building systems.
• Able to work in a group of engineers and designers to complete technical portions of projects within established budgets and schedules.
• Familiarity with discipline-specific tools such as: Carrier HAP, Trane TRACE, AutoCAD, MicroStation, etc.
• Knowledge of applicable codes & standards (International Mechanical Code, NFPA, ASHRAE, etc.).
• Strong organizational skills and attention to detail.

Preferred Qualifications:

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

• Engineering-in-Training (EIT), or ability to obtain
• Strong analytical, problem-solving, and communication skills
• Proficiency with Microsoft Office (Excel, Word, Outlook)
• Self-motivated and team-oriented professional with high personal integrity

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 computer-aided 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 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%

Compensation Details:

$75,000 - $115,000

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:

08/03/2026 - 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 at Labor Laws Posters.