Amentum · 1 day ago
Engineer-Third Class
Washington, DC
Full-time
Onsite
Mid, Senior Level
$97K/yr - $102K/yr
1+ years expAmentum is seeking a licensed and skilled Engineer – 3rd Class to support facility operations and mechanical system maintenance. This role is responsible for the operation, maintenance, and repair of complex building systems, including boilers and HVAC equipment, while guiding junior engineering staff.
Mechanical EngineeringSecurityTechnical Support
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Operate, monitor, and maintain boilers, HVAC units, electrical systems, pumps, and other critical mechanical infrastructure
Perform preventive and corrective maintenance on a wide range of mechanical and electro-mechanical equipment
Diagnose operational issues and conduct troubleshooting to ensure optimal system performance
Ensure compliance with mechanical and electrical safety codes, regulations, and industry standards
Complete equipment inspections, log readings, and maintain accurate maintenance documentation
Support energy efficiency initiatives and system optimization efforts
Provide support and direction to junior engineers and maintenance personnel
Respond to equipment failures, emergency conditions, and building alarms with professionalism and technical expertise
Collaborate with facility managers, contractors, and engineering teams on repairs and upgrades
Qualification
Required
Secret Clearance (required)
Bachelor's degree in Mechanical Engineering from an accredited college or university
3rd Class Steam and Hot Water Heating Boiler Engineer License (required)
1–5 years of experience in engineering services, facility maintenance, or mechanical systems operations
Strong understanding of building systems, including boilers, HVAC, electrical systems, and controls
Ability to read schematics, technical manuals, and engineering documentation
Knowledge of safety best practices and mechanical system codes
Preferred
Experience working in federal, Department of State (DOS), or high‑security environments
Familiarity with building automation systems (BAS)
Experience operating systems in large commercial, industrial, or mission-critical facilities
Additional mechanical certifications or engineering training
Benefits
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
Company
Amentum
Amentum is a technology and engineering company for security, defense, and energy.
10001+ employees
Funding
Current Stage
Public CompanyTotal Funding
$321.16M2025-03-12Post Ipo Secondary· $321.16M
2024-09-27IPO
2020-01-01Private Equity
Leadership Team
Ajay Nagar
Vice President
Darren Burton
Chief People Officer
Recent News
2026-02-03
2026-01-20
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