Plant Designer Senior – Remote/Hybrid

Plant Designer Senior necessary Job skills will include but are not limited to:

A general understanding of Building Mechanical Systems: HVAC/Piping/Plumbing

Develop piping systems and equipment layout in SmartPlant 3D or similar BIM design tools.

Developing General Equipment Arrangement Deliverables.

A basic understanding of schedules and budgets of the Plant Design and Piping Team.

Assist with resolving interferences and developing resolutions

Ensuring proper integration with other BIM tools such as Intelligent Schematics.

Working with Piping Engineering on Pipe Specifications and Stress analysis support locations.

Working with Structural Engineering for Pipe Support designs.

Managing the model outputs for material lists and reports.

Working with Civil on underground interface connections

Requirements :

AS Degree or Higher

14+ years using BIM tools for Plant Design

Chemical process industrial mechanical/piping design experience

Nuclear piping design experience is preferred

Candidates local to Oak Ridge, TN is preferred, However, candidates with applicable experience and qualifications that are local to Oak Ridge, TN are encouraged to apply while considering additional travel requirements.

Essential Functions:

Intermittent sitting, walking, standing, bending, squatting, climbing, kneeling, twisting, and lifting. Lifting requirements limited to 20 lbs. in the form of supplies, drawings, etc. Longest distance carried of 50 feet. Hand manipulation is required for simple grasping, pushing and pulling, and fine manipulation. Right and/or left hands utilized. Occasional need to reach and/or work above the shoulder, for supplies, as well as below the shoulder for same. No foot controls necessary. Must be alert to equipment in the field, there will be occasional travel, will work near construction job site equipment when in the field, occasional need to work near hazardous equipment and machinery, occasional need to walk on uneven ground, exposure to dust, gas or fumes, exposure to noise, extremes in temperature or humidity, and potential work at heights.

We help prepare people for new opportunities and challenges. With positions at every level, openings in multiple disciplines, expertise in a range of markets and offices around the globe, we create an environment where you can learn, grow, and thrive.

Equipment and Machines: Standard office PC, with software will be provided

Other Essential Functions

U.S. Citizenship required.

Valid driver's license is required. Must be able to work in a team atmosphere.

Must put forward professional behavior that enhances productivity and promotes teamwork and cooperation.

Compensation Details:

$60 - $79

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:

09/11/2026 - 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 .