Facilities Maintenance Assistant II

Facilities Maintenance Support Technician – Idaho Falls (SFHP INL)

We are looking for a Facilities Maintenance Support Technician (MST). The MST plays a key role in maintaining a tenable and acceptable housekeeping standard for the Spent Fuel Handling Recapitalization (SFHP) construction project. The MST will maintain temporary facilities at the Naval Reactors Facility (NRF) on the Idaho National Laboratory (INL). Primary responsibilities will include performing a range of cleaning and sanitation duties across multiple construction and office trailers. This includes sanitation of lunchrooms, conference rooms, and restrooms. You’ll be performing a full range of cleaning duties, individually or as part of a group, daily for the purpose of maintaining acceptable housekeeping in accordance with CDC guidelines. Typical shift will begin at 0630 hours and end at 1700 hours Tuesday through Friday.

The work location for this position is the Naval Reactors Facility, Idaho National Laboratory, Scoville, ID  83213, approximately 55 miles WNW of Idaho Falls, Idaho.

Job Responsibilities:

• Work individually or as part of a small team.
• Clean and disinfect break rooms, offices, conference rooms, kitchens and restrooms.
• Resupply consumables (e.g. paper towels, toilet paper, soaps).
• Organize and manage inventory of all cleaning supplies and consumables.
• Notify purchasing agents when consumable inventories are low and need to be ordered.
• Maintain orderly supply cabinets and closets used to store janitorial equipment and supplies.
• Vacuum, sweep, and mop floors, carpets, and rugs. Remove scuff marks and heavy dirt/mud as necessary.
• Empty trash and recycling receptacles. Gather all trash and recycling and dispose of in on-site roll-off containers.
• Clean and sanitize restrooms (e.g. sinks, fixtures, toilets). Clean mirrors.
• Arrange furniture for occasional special meetings and functions.
• Performs other duties as assigned.

Requirements:

• High School diploma or equivalent GED.
• Minimum one year experience in a custodial related field.
• Must be able to operate floor-care machines and other custodial equipment properly, safely, and efficiently.
• Ability to communicate effectively, verbally, and in writing.
• Ability to develop effective working relationships with supervisor and fellow employees.
• Ability to perform work independently.

Preferred Qualifications

• Experience with the MS Office Suite - specifically Word and Excel.
• Person already residing a commutable distance from the Naval Reactors Facility at Idaho National Laboratory.
• Working knowledge of practices, tools, equipment, and materials used in custodial work; safety practices of custodial work and use of cleaning agents and equipment.

Work Environment:

Work will occur at the SFHP construction site, which is 55 miles west of Idaho Falls, ID.  Tasks require a variety of physical activities generally involving muscular strain. Physical demands may occur in activities related to walking, standing, stooping, sitting, reaching, lifting, etc. Talking, hearing and seeing required in the daily performance of job duties. Exposure to environmental hazards and dangers resulting from working around dangerous equipment.

Physical Requirements:

• Appropriate PPE and training will be provided for all conditions.
• Must be able to sit, walk, stand, bend, squat, climb, kneel, twist, and lift. Lifting requirements limited to 25 lbs. in the form of supplies and equipment. 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, reach for supplies, as well as below the shoulder for same. Must be alert to hazards in the field.

Other Essential Functions

U.S. Citizenship required. Valid driver's license is required. Must be able to work in a team atmosphere and effectively communicate. 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.

Amentum's nuclear business supports federal agencies, national laboratories, government-owned contractor-operated facilities, commercial nuclear organizations, and emerging energy technology developers. We routinely collaborate with specialists in process engineering, nuclear engineering, mechanical systems, electrical power systems, instrumentation and controls, civil and structural design, construction management, project controls, safety analysis, commissioning, and operations.

A unique aspect of Amentum is our participation in the management and operation of major DOE and NNSA sites across the United States through joint ventures and limited liability companies. Engineers can support ongoing operations, infrastructure modernization, facility upgrades, mission-critical systems, environmental programs, the NNSA weapons program, and new capital asset projects at some of the nation's most important nuclear and national security facilities.

Our teams are also connected to an international project portfolio. Amentum supports major nuclear infrastructure and new-build programs globally, creating opportunities for engineers to collaborate with project teams supporting work in the United Kingdom, Poland, the Middle East, and other international markets. Depending on business needs and individual interests, engineers may have opportunities for temporary assignments, project secondments, and global technical collaboration.

For professionals who want to solve meaningful technical problems, work alongside recognized industry experts, and build experience across a diverse portfolio of projects and facilities, Amentum offers opportunities and a career that extends far beyond a single program or site. The result is exposure to technologies, customers, facilities, and engineering challenges that few organizations can match.

Amentum is a leading global government and commercial services contractor headquartered in Chantilly, Virginia. We specialize in advanced engineering, mission modernization, space systems, and nuclear and advanced energy solutions, employing over 53,000 people across approximately 80 countries on all 7 continents. Amentum Nuclear Global Center of Excellence is located in Oak Ridge, Tennessee.

Compensation Details:

$50,000 - $60,000

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:

09/22/2026 - 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.