Construction Estimator

Amentum Nuclear Projects is seeking an on-Site estimator to support multiple EPCM construction projects. Assist with client pricing for changes to program. Assist with check estimates/ review subcontractor requested changes for all disciplines including Electrical and Mechanical. Part of multi project team running $M+ projects for a single client. In this role you will:

• Coordinate with home office estimators for larger estimating efforts.

• Develop construction cost estimates, primarily on changed conditions.

• Lead and Estimate tasks for labor and material costs of construction projects, new and for changed conditions, interpret plans & specifications from multiple design phases (conceptual through 100% Construction Documents), and generate quantity takeoffs and pricing for all divisions of work including Electrical and Mechanical.

• Expected to assist in the preparation of larger and more complex assignments.

• Use knowledge of general application of construction and estimating principles, theories, concepts, and industry practices and standards to perform moderately complex assignments under general supervision to produce accurate and quality cost estimates:

• Analyze specifications, sketches, blueprints, bills of material, and subcontractor quotations.

• Coordinate with design personnel to fully comprehend the nature of changed conditions.

• Coordinate with construction management personnel to fully comprehend the nature of changed conditions.

• Assist with contractor negotiations if needed.

• Prepare and maintain historical cost data

Requirements:

• Microsoft Excel expertise

• 4 or more years of experience, education can substitute for some experience

• Bachelors degree in math, business, accounting, Engineering, Construction Management, or other related field highly preferred

• Ability to plan, organize, document, perform, review and present multiple sub-projects with minimum supervision

• Communication skills including the ability to interact with all levels of the project team.

• Knowledge of specifications, sketches, blueprints, bills of material, and subcontractor quotations

• Person already residing a commutable distance from the Oak Ridge, TN area is preferred

• Experience large scale heavy industrial projects highly preferred.

• Experience with Sage Estimating (aka Timberline Estimating Software or equivalent) is a plus

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.

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 a professional behavior that enhances productivity and promotes teamwork and cooperation. Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others. Must take and pass a pre-employment drug, background check and site security badge screening

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. From our competitive benefits program to our Health and Safety initiative of Beyond Zero workplace injuries, we believe that you'll find a flourishing career here.

Compensation Details:

$90,000 - $130,000

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:

01/29/2026 - 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 ( .