Cost Estimator II

Amentum; St. Marys (GA); On-site; USD 75,000 - 90,000; Full time

Benefits offered by this job

Health insurance

Paid time off

Retirement benefits (401(k) matching)

Educational reimbursement

Parental leave

Employee stock purchase plan

Tax-saving options

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking a Cost Estimator II to support a government contract based in Kings Bay, Georgia. The role develops accurate cost estimates for maintenance, repair, alteration, renovation, and minor construction projects, performs quantity takeoffs, and prepares independent government-style estimates for management review.

The ideal candidate has 2–5+ years in construction estimating or project controls, is proficient with RSMeans or similar software, and has strong Excel skills.

Qualifications

• Bachelor’s degree required or equivalent; 2–5 years of related experience.
• Two to five plus years of construction estimating, project controls, or related experience.
• Demonstrated experience preparing detailed construction estimates and quantity takeoffs.
• Proficiency with RSMeans or similar estimating software.
• Strong Microsoft Excel, Word, Outlook, and database management skills.
• Ability to manage multiple priorities, meet deadlines, work independently, and present cost information clearly to management.
• US Citizenship required for facility credentials/authorization at Kings Bay, GA.

Responsibilities

• Prepare detailed cost estimates, ROMs, budgetary estimates, and proposal pricing packages.
• Perform quantity takeoffs for civil, structural, architectural, mechanical, electrical, fire protection, and site-work.
• Utilize RSMeans, historical cost databases, subcontractor pricing, vendor quotations, and market research to develop estimates.
• Conduct field investigations and site visits to validate project scope and constructability.
• Coordinate with project managers, engineering personnel, operations leaders, and customers to define project requirements.
• Develop scopes of work and solicit pricing from subcontractors and suppliers.
• Analyze labor, equipment, productivity, material, and subcontract costs to ensure realistic pricing.
• Support construction management initiatives by identifying project risks and schedule impacts.

Skills

RSMeans cost estimation

Microsoft Excel

Budgeting and cost analysis

Takeoffs

Stakeholder communication

Education

Bachelor’s degree in Construction Management, Engineering, Architecture, or related field

Tools

Maximo

Project management software

CMMS platforms

Job description

Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well-being are integral to success.

Amentum is currently seeking for a Cost Estimator II to support a government contract based in Kings Bay, Georgia.

POSITION SUMMARY

The Estimator II is responsible for developing accurate, timely, and well-documented cost estimates for maintenance, repair, alteration, renovation, and minor construction projects. The position serves as a key link between operations, project management, subcontractors, customers, and company leadership by evaluating project scope, performing quantity takeoffs, developing independent government-style estimates, and supporting project execution strategies.

Essential Duties and Responsibilities

• Prepare detailed cost estimates, ROMs, budgetary estimates, and proposal pricing packages.
• Perform quantity takeoffs for civil, structural, architectural, mechanical, plumbing, electrical, fire protection, communications, and site-work disciplines.
• Utilize RSMeans, historical cost databases, subcontractor pricing, vendor quotations, and market research to develop estimates.
• Conduct field investigations and site visits to validate project scope and constructability.
• Coordinate with project managers, engineering personnel, operations leaders, and customers to define project requirements.
• Develop scopes of work and solicit pricing from subcontractors and suppliers.
• Analyze labor, equipment, productivity, material, and subcontract costs to ensure realistic pricing.
• Support construction management initiatives by identifying project risks, schedule impacts, phasing requirements, and execution strategies during project development.
• Assist in capital planning, facilities sustainment, and infrastructure improvement programs.
• Maintain estimating databases, unit-cost libraries, and cost trends to improve estimating accuracy.
• Prepare estimate narratives, assumptions, exclusions, and supporting documentation for management review.
• Support proposal development, contract modifications, change orders, and negotiated pricing actions.
• Monitor awarded projects and compare actual costs against estimates to improve future performance.

Construction Management Support Functions

In addition to estimating responsibilities, this position may support construction management program development and project controls initiatives, including:

• Participating in project planning and project execution strategy development.

• Assisting with project controls, budgeting, forecasting, and cost tracking.

• Developing project documentation, schedules, status reports, and performance metrics.

• Supporting contractor oversight, quality assurance, and construction coordination activities.

• Contributing to continuous improvement efforts, standard estimating practices, and program maturity initiatives.

EDUCATION / EXPERIENCE/ QUALIFICATIONS

• Bachelor’s degree in Construction Management, Engineering, Architecture, Business, or related field; two (2) years of experience in related field may be substituted for each year of the four (4) years of college.

• Two (2) to five (5) plus years of construction estimating, project controls, construction management, facilities management, or related experience.

• Demonstrated experience preparing detailed construction estimates and quantity takeoffs.

• Proficiency with RSMeans or similar estimating software.

• Strong Microsoft Excel, Word, Outlook, and database management skills.

• Ability to manage multiple priorities, meet deadlines, work independently, collaborate with cross-functional teams, and present cost information clearly to management and customers.

• Successful candidate will be subject to a government security investigation and must continually meet eligibility requirements for access to all areas of Naval Submarine Base Kings Bay.

• Must be able to obtain and maintain facility credentials/authorization. Note: US Citizenship is required for facility credentials/authorization at this work location.

PREFERRED QUALIFICATIONS

• Experience supporting U.S. Navy, Department of Defense, or federal facilities contracts.

• Knowledge of construction management principles and project lifecycle management.

• Experience with Maximo, project management software, or CMMS platforms.

• Professional certifications such as CCP, CPE, PMP, CCM, or related credentials.

OTHER RESPONSIBILTIES

Safety - Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self-aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams.

Quality - Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities.

Procedure Compliance - Each employee must read, understand, and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to job.

Compensation Details:

$75000-$90000

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:

10/21/2026 - 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.