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Mid-Level Mechanical Designer (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 Designer to support our Nuclear Projects - Oak Ridge.

Description:

As a mid-level mechanical designer, you will provide support for the design and development of HVAC, piping, and plumbing systems for industrial and government (nuclear / DOE) facilities. Working under the guidance of Senior Designers and Mechanical Engineers, you will develop 3D models and produce detailed design deliverables while coordinating closely with multidisciplinary teams to deliver fully integrated, highquality design packages.

This role requires strong technical proficiency with BIM and plant design tools and the ability to work independently on assigned design tasks within established quality and project standards.

Key Responsibilities:

• Develop 3D models for HVAC equipment, ductwork, piping, and plumbing systems using SmartPlant 3D, AutoCAD Plant 3D, Revit, or similar tools
• Produce detailed design deliverables, including:
  • Equipment layouts
  • Duct and piping plans
  • Isometric drawings
  • Sections, and details
• Incorporate engineering markups, and redlines into constructible models and drawings
• Coordinate designs with mechanical engineers and other disciplines (structural, electrical, process, I&C)
• Participate in interference detection and resolution (clash reviews)
• Ensure proper integration of mechanical designs with other models and project tools
• Apply established design standards, procedures, and quality requirements
• Perform selfchecks and assist senior staff with drawing corrections and revisions
• Participate in field walkdowns or site coordination activities when needed

Basic Qualifications:

• High School Diploma or GED (Associate Degree in Drafting, Design, or Engineering Technology preferred)
• 5+ years of experience in mechanical design for industrial or government facilities
• Experience with HVAC, piping, and plumbing layout design
• Proficiency with 3D modeling tools such as: SmartPlant 3D / Plant 3D / Revit.
• Ability to learn new design software and workflows efficiently
• Selfmotivated, detailoriented, and teamfocused work style
• Strong communication and coordination skills

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)
• Strong organizational and communication skills
• Demonstrated attention to detail and commitment to technical excellence

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:

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:

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.