Cost Estimator

Purpose and Scope: The Cost Estimator III serves as a seasoned, senior-level professional responsible for producing comprehensive, discipline-integrated construction cost estimates that support complex industrial facilities maintenance and infrastructure projects. The role performs advanced quantity takeoffs; evaluates labor, material, equipment, productivity, market conditions, and risk factors; and applies both established and innovative estimating tools and standards to generate highly reliable ROM, budgetary, and task-level cost data. Operating with minimal guidance, the position interfaces extensively with project stakeholders and customers to validate scope, schedule, and technical requirements. The CE III ensures estimates reflect increased complexity, are thoroughly documented, and contributes to process improvements and team capability. Job Duties and Essential Responsibilities: Perform advanced estimating activities supporting complex industrial operations and infrastructure projects, requiring independent evaluation of diverse, non-routine scope elements. Complete multi-disciplinary, highly detailed quantity takeoffs, including specialized systems, demonstrating expert-level insight into cost drivers. Apply seasoned judgment in analyzing labor, material, equipment, productivity, market conditions, escalation, and risk. Provide analytical, critical-thinking, and communication skills to influence decision-making and identify cost-effective alternatives. Independently manage multiple concurrent estimates with exceptional accuracy and timely execution. Demonstrate advanced proficiency in RSMeans and improve estimating tools and methodologies. Ensure estimates meet scope, schedule, and budget expectations with increased complexity. Develop complete, traceable documentation including assumptions and Basis of Estimate narratives. Interface proactively with cross-functional teams to validate scope and ensure alignment. Mentor junior estimators and support team development. Perform other duties as assigned. Required Education/Experience/Certification Bachelor of Science degree in Engineering, Construction Management, or related field. Equivalent experience may be substituted for degree 5+ years of job-related experience. Preferred Education/Experience/Certification Experience in HVAC and Fire Protection construction preferred. Required Minimum Position Knowledge, Skills, and Abilities: Proficient working knowledge of RS Means or similar Construction Cost Estimating software. Good communications and analytical skills. Working knowledge of computer systems and integrated software application programs. Working knowledge in MS Office Suite. Demonstrated ability to meet schedule deadlines. Demonstrated ability to navigate through all sections of cost estimating software. Other Requirements: Must be a U.S. citizen and able to obtain and maintain required clearances/badges as required by program and position Must have the ability to communicate in English, both verbal and written in an effective manner. Must have and maintain a valid driver's license. Work Environment, Physical Demands, and Mental Demands: This position involves work typical of an office environment with no unusual hazards; occasional lifting to 20 pounds; constant sitting with use of computer terminal; constant use of sight abilities while reviewing documents; constant use of speech/hearing abilities for communication; constant mental alertness; must possess planning/organizing skills and must be able to work under deadlines. Field work will consist primarily of site walk downs in support of design projects and system troubleshooting Site hazard training and Personal Protective Equipment are provided. Company Conformance Statement In the performance of their respective tasks and duties all employees are required to conform to the following: Perform quality work within deadlines with or without direct supervision. Interact professionally with other employees, customers, and suppliers. Work independently while understanding the necessity for communicating and coordinating work efforts with other employees and organizations. Employees are required to: Comply with all applicable safety and health-related rules, regulations, and procedures. Work safely themselves and help their teammates work safely. Assist supervisors and managers in identifying and mitigating potentially hazardous conditions. Help the organization maintain a safe and healthy workplace. Compensation Details: $89K 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: 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: 06/16/2026 - 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. #J-18808-Ljbffr