Amentum delivers world-class solutions through the expertise, dedication, and collaboration of our people. We partner with our customers to solve complex challenges and are committed to fostering a workplace where employees can grow, succeed, and make a difference. We are currently seeking a Operating Engineer 3rd Class.
The Engineer - 3rd Class is a licensed engineering professional responsible for the operation, maintenance, troubleshooting, and repair of complex mechanical, electrical, and HVAC systems within a facility.
This position plays a critical role in ensuring the safe, efficient, and reliable operation of building infrastructure and Central Plant equipment.
The Engineer - 3rd Class possesses extensive technical knowledge of boilers, steam and hot water systems, HVAC equipment, electrical systems, and associated mechanical equipment. Working with a high degree of independence, the Engineer performs preventive and corrective maintenance, responds to equipment failures, and ensures compliance with all applicable safety regulations, codes, and operational standards.
Essential Duties and Responsibilities- Operate, monitor, and maintain Central Plant equipment and building systems.
- Perform preventive, predictive, and corrective maintenance on boilers, HVAC systems, pumps, motors, generators, and electrical equipment.
- Troubleshoot mechanical and electrical issues and implement effective repair solutions.
- Monitor system performance to ensure efficient and uninterrupted facility operations.
- Conduct routine inspections of equipment and systems to identify maintenance needs and potential failures.
- Respond to equipment malfunctions, alarms, and emergencies in a timely manner.
- Maintain accurate maintenance records, operating logs, and regulatory documentation.
- Ensure compliance with all safety procedures, environmental regulations, and facility policies.
- Coordinate with facility management, contractors, and vendors as required to support maintenance and repair activities.
- Assist with equipment upgrades, renovations, and capital improvement projects.
- Support the training and development of less experienced engineering staff as needed.
- Active Secret Security Clearance (required).
- Valid District of Columbia 3rd Class Steam and Hot Water Heating Boiler Engineer License (required).
- Minimum of three (3) years of experience in Engineering Services, facilities engineering, building operations, or a related field.
- Demonstrated experience operating and maintaining boilers, HVAC systems, and complex building mechanical and electrical equipment.
- Working knowledge of applicable safety regulations, codes, and industry standards.
- Ability to read and interpret technical manuals, blueprints, and schematics.
- Strong troubleshooting, problem-solving, and diagnostic skills.
- Ability to work independently and effectively in a team environment.
- Experience working in government, mission-critical, healthcare, laboratory, industrial, or large commercial facilities.
- Familiarity with Building Automation Systems (BAS) and Computerized Maintenance Management Systems (CMMS).
- Experience with steam distribution systems, chilled water systems, and emergency power systems.
Compensation Details:
$97,000-$105,000
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:
09/03/2026 - Until FilledAmentum 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.
Skills Required
- Active Secret Security Clearance
- Valid District of Columbia 3rd Class Steam and Hot Water Heating Boiler Engineer License
- Minimum of three years of experience in engineering services, facilities engineering, building operations, or a related field
- Experience operating and maintaining boilers, HVAC systems, and complex building mechanical and electrical equipment
- Working knowledge of applicable safety regulations, codes, and industry standards
- Ability to read and interpret technical manuals, blueprints, and schematics
- Strong troubleshooting, problem-solving, and diagnostic skills
- Ability to work independently and effectively in a team environment
- Experience working in government, mission-critical, healthcare, laboratory, industrial, or large commercial facilities
- Familiarity with Building Automation Systems and Computerized Maintenance Management Systems
- Experience with steam distribution systems, chilled water systems, and emergency power systems
Amentum Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Amentum and has not been reviewed or approved by Amentum.
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Healthcare Strength — Healthcare offerings are described as comprehensive, with medical, dental, and vision plans and multiple PPO/HSA options. Mental health support via an employee assistance program and other wellness resources is also included in the benefits mix.
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Retirement Support — Retirement support is positioned as a meaningful part of total rewards through a 401(k) plan with employer matching. Profit-sharing contributions and immediate or near-term vesting in some cases further strengthen the retirement value proposition.
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Leave & Time Off Breadth — Time-off benefits are presented as solid for the sector, including tiered PTO accrual by tenure and a set of paid holidays. Role-dependent flexible or remote work options and leave programs add to perceived work-life support.
Amentum Insights
What We Do
Amentum is a premier global technical and engineering services partner supporting critical programs of national significance across defense, security, intelligence, energy, and environment. We draw from a century-old heritage of operational excellence, mission focus, and successful execution underpinned by a strong culture of safety and ethics. Headquartered in Germantown, Md., we employ more than 20,000 people in 48 states and 28 foreign countries and territories. Visit us at amentum.com to explore how we deliver excellence for our customers’ most vital missions.
