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Salary
≈ $45k – $86k per year (Estimated)
Location
In office (United Kingdom)
Seniority
Junior · 1+ year exp
Visa
Licensed UK visa sponsor
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 25, 2026. First seen by Alion on Aug 5, 2026. Amentum scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Amentum is a US government and critical infrastructure services contractor headquartered in Chantilly, Virginia, providing engineering, technical, mission support and operations services in defense, intelligence, space, energy and environment markets. It has about 50,000 employees in more than 70 countries, is listed on the New York Stock Exchange, and absorbed PAE in 2022 before combining with the Jacobs critical mission solutions business in 2024. Openings include aerospace, GN&C and reliability engineers, aircraft workers, database administrators, software engineers, biometric enrollment specialists and paralegals.

Amentum, a global leader in advanced engineering, technical, and professional services serving the US government, allies and critical infrastructure sectors, is seeking a Network Security Officer (NSO) to support a government contract based on the island of Diego Garcia.

PURPOSE / SCOPE

The NSO is responsible for overseeing the network infrastructure within the Program to include cyber security, safety, and protection of the systems and data. Will monitor to proactively protect against any emerging threats while maintaining current knowledge and training to consistency provide Program security to data and systems. NSO will perform other duties as assigned by Program leadership.

The NSO will be available for on-call support as needed 24 hours/day, 7 days/week in this role.

QUALIFICATIONS

  • Bachelor’s degree from an accredited four-year college or university with a major in computer science / engineering, electrical engineering, computer science, or equivalent combination of experience, education and training
  • Will perform duties per SECNAV M-5239.2
  • Must have three years’ experience in a similar role preferably in the military or a government installation.
  • Must have Security + / CISM / CISSP
  • Must be familiar with current global, US, Program and PWS requirements
  • Excellent organizational and time management skills
  • Ability to obtain and maintain a US passport and driver's license throughout employment in this role
  • Passport must be valid for a minimum of one (1) year or more at the time of hiring
  • Ability to successfully pass the medical contract requirements and maintain compliance throughout the duration of deployment
  • Must be able to obtain and maintain facility credentials/authorization. Note: US Citizenship is required for facility credentials/authorization at this work location.
  • Ability to obtain country-specific visas as required by the U.S. Department of State Foreign Clearance Guide

WORK ENVIRONMENT, PHYSICAL DEMANDS

  • Able to stand for long periods of time such as eight (8) to ten (10) hours, bend, kneel, and reach to store/retrieve supplies
  • Able to lift, carry, and push supplies and boxes up to 50 pounds
  • Living and working conditions at the assignment location could be remote and uncomfortable
  • May work in a typical office environment
  • This position is located on Diego Garcia, British Indian Ocean Territory (BIOT), a remote overseas location supporting U.S. Government operations. Employees may work in offices, industrial warehouses, ports, airfield, and outdoor environments and may be exposed to high temperatures, humidity, inclement weather, noise, dust, and uneven terrain. Work schedules may include evenings, weekends, holidays, and extended hours based on operational requirements.

PHYSICAL REQUIREMENTS

Requirements may include prolonged sitting, standing, walking, climbing stairs, and working in both indoor and outdoor environments. Must be able to meet all medical, security, and deployment requirements associated with assignment to a remote overseas location.

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 job.

This position is pending contract award.

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