SYSTEMS ADMINISTRATOR (LINUX)

Job description

Amentum is seeking a Systems Administrator (Linux) for a position on Kauai, HI. Provides Red Hat Enterprise Linux (RHEL) system administration for all Clients and Servers connected to the Pacific Missile Range Facility (PMRF) classified and unclassified networks. Deploys Cyber Security mandated system upgrades, system patches, and system security lockdown requirements. Performs system wide troubleshooting and problem resolution in a live mission environment. Responsibilities Administer and maintain Red Hat Linux (RHEL) and other Linux-based environments in classified and unclassified environments across Navy networks. Implement and maintain RMF security controls and ensure systems are compliant with DISA STIGs and DoW cybersecurity policies. Apply and manage patches and updates across all Linux systems in accordance with DoW and Navy patch management policies. Manage automated installation methods and system imaging (e.g., SCCM, VMware, Nutanix, Satellite, Ansible) Perform system hardening, patching, and vulnerability remediation using tools such as ACAS, ESS, and SCAP. Develop and maintain PowerShell scripts for automation of administrative tasks and system configuration. Support virtualization platforms (VMware, Hyper-V) and manage virtual infrastructure lifecycle. Collaborate with cybersecurity teams to support ATO packages, POA&Ms, and audit readiness. Maintain system documentation, configuration baselines, and standard operating procedures (SOPs). Participate in Change Control Boards (CCBs) and Configuration Management Boards (CMBs). Assist with incident response, forensic analysis, and system recovery efforts. Support backup and disaster recovery strategies using enterprise tools (e.g., Veeam, Commvault). Evaluate and recommend new Linux technologies and DoW-approved tools. General office environment with site visits as well as periodic "at sea" duty to support the PMRF's Mobile at Sea Sensor system (MATSS) Candidate must be capable of working in a team environment and participate in technical and system administrative activities throughout project life cycles. Perform other duties as assigned. Physical Elements/ Environment Lifting, Pushing/Pulling: over 50lbs Work positions requirements: walking, standing, crawling, kneeling, cramped, sitting and work requiring repeated stooping or frequent climbing. Environment: customer contact, extended workday, confined work area, office laboratory, field assignment, and inclement weather. Minimum Qualifications Experience One (1) year of System Administration/IT experience Years of directly related work experience may be substituted for a degree Knowledge of IT systems and advance IT infrastructure concepts Must be proficient in operating personal computers, computer software and standard office equipment Must have basic keyboarding skills and aptitude for neatness and accuracy in sorting Critical thinking - Proven problem solver Education Associate's Dregee High School Diploma with four (4) years of directly related system administration experience may be substituted for an A.S. degree. Advance certifications or education may be substituted for a degree or experience Certifications (subject to change based on industry, DoW, or local policy requirements) DOD 8570.1M IAT Level II required prior to start Linux+ or Red Hat Certified System Administrator (RHCSA) Certification required prior to start Preferred Qualifications Advance knowledge and certification in both Windows Server and RHEL Proficiency in automation tools and scripting (e.g., PowerShell, Bash, Python) VMware/Nutanix certification Knowledge/Administration of Trellix, LogRhythm, and MDE Experience with DoW systems and infrastructure Knowledge in Cyber Security Methods and Techniques Knowledge of DoW IT systems, to include Windows, RHEL, and comprehensive infrastructure concepts Security Clearance Must be able to obtain and maintain a Top Secret US Government Clearance. Note: US Citizenship is required to obtain and maintain a Top Secret Clearance. Applicants selected either must currently possess a Top Secret clearance or will be subject to a US Government Security Investigation and must meet eligibility requirements to obtain clearance prior to commencement of employment and maintain a security clearance for access to classified information or Closed/Restricted Areas throughout duration of employment. 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: 09/03/2026 - 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 .