Facility Security Officer

Amentum is looking for a Facility Security Officer (FSO) to join our team in Falls Church, VA . Under the supervision of the Senior Security Manager, this position will provide mostly administrative security support for Intelligence Community programs.

Must have an Active Top Secret/SCI US Government clearance with Polygraph. Note: US Citizenship is required to maintain a Top Secret/SCI clearance with Polygraph.

Essential Responsibilities:

Provide a diverse range of administrative support functions such as maintaining records, data entry, filing, and protecting personal, identifiable information.

Conduct briefings for new hires, to include new hire folders and packets for briefing.

Conduct debriefings and terminations. Construct and submit required paperwork in a timely manner.

Conduct quality control review of investigation packages (Questionnaire for National Security Positions SF-86 to ensure they are complete and accurate prior to submittal (no entry left blank, required timelines are covered, etc.). Create crossover and initial forms to submit to customer for signature

Complete badge renewals for employees possessing a customer-issued badge.

Ensure yearly Financial Disclosure Forms (FDF) are completed for the contract to meet customer deadline.

Submit uncleared employees for visitor access in accordance with customer policy.

Assist in reviewing Security Pre-Screen Forms for all applicants requiring a security clearance

Conduct clearance checks enterprise-wide for legitimate business purposes utilizing Scattered Castles and other databases

Update and maintain contract personnel listing

Comply with all Security requirements (NISPOM, ICDs, and company policies)

Participate in clearance processing notifications to employees with HR

Ensure all employees are briefed or have appropriate SCI briefings

Assist with Security investigations when needed or directed

Provide ad hoc security support for personnel seeking guidance or direction

Perform all other position-related duties as assigned or requested.

Minimum Requirements:

4 years of job-related (Intelligence Community) experience or equivalent.

Associate's degree (work experience can be considered in lieu of a degree).

Must be able to work with operational application software including word-processing and spreadsheet programs.

Must have an active Top Secret/SCI US Government Clearance with Polygraph. Note: US Citizenship is required to maintain a Top Secret/SCI Clearance with Polygraph.

Work Environment, Physical Demands, and Mental Demands:

Typical office environment with no unusual hazards, occasional lifting to 20 pounds, constant sitting while using the 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.

Other Responsibilities:

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 his/her job.

#javelin

Compensation Details:

$90k-$110k

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:

06/09/2026 - 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 ( .