Mechanical Designer Jr

Jr-Level Mechanical Designer

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 Jr-Level Mechanical Designer to support our Nuclear Project – Oak Ridge.

As a Jr-level mechanical designer, you will support the design and development of HVAC, piping, and plumbing systems for industrial and government facilities, including nuclear and DOE projects. Working under the supervision of Senior Designers and Mechanical Engineers, this role contributes to the development of construction‑level design deliverables that meet project, quality, and safety requirements.

This role is ideal for an early‑career designer who is building technical skills in CAD and plant design tools, enjoys collaborative work, and is eager to grow within a multidisciplinary engineering environment.

• Develop 2D drawings for HVAC equipment, ductwork, piping, and plumbing systems using AutoCAD, Micro Station, or similar tools
• Prepare design deliverables under supervision, including:
  • Equipment layouts
  • Duct and piping plans
  • Isometric drawings
  • Sections, and details
• Incorporate engineer and senior designer markups and redlines into accurate drawings
• Coordinate designs with mechanical engineers and other disciplines (structural, electrical, process, I&C)
• Ensure proper integration of mechanical designs with other disciplines
• Apply established design standards, procedures, and quality requirements
• Perform self‑checks and support revisions to drawings as directed
• Participate in field walkdowns or site coordination activities when needed

• High School Diploma or GED (Associate Degree in Drafting, Design, or Engineering Technology preferred)
• 0 to 5 years of experience in mechanical design for industrial or government facilities
• Experience with HVAC, piping, and plumbing layout design
• Working knowledge of 3D design software such as AutoCAD and Micro Station
• Ability to learn new software tools, workflows, and design standards
• Strong attention to detail and willingness to accept technical guidance and feedback
• Effective communication skills and ability to work in a team‑based environment

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

• Prior nuclear, DOE, or high‑hazard facility design experience
• Experience working under a formal quality program (ISO 9001, NQA
  1)
• Experience supporting multidisciplinary design teams
• Demonstrated interest in professional growth and technical development

• This position is primarily located onsite at an active industrial construction project
• The work environment may involve frequent presence in construction and operational areas with exposure to elevated noise levels, hazardous materials, and other site‑specific hazards
• Adherence to project safety requirements and site access controls is required

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

$55,000 – $65,000

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.