Jr. Systems Administrator

Amentum is seeking a Jr. Systems Administrator for a position on Kauai, HI. This entry level exempt position provides technical based oversight and management of systems administration and information assurance activities related to the PMRF range systems. Provides entry level Red Hat Enterprise Linux (RHEL) or Windows Modern Desktop, Windows Servers 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 Provide entry level systems administration for all clients, servers, and peripherals connected to the classified and unclassified PMRF networks. Deploy, configure, and maintain systems, including software installation, updates, upgrades, patching, and core services related to Linux or Windows workstations, servers, and applications. Implement DISA STIG secure configuration requirements to applicable workstations, servers and applications. Manage users and groups, including using a centralized directory for authentication. Configure local storage using partitions and logical volumes. Create and configure file systems and file system attributes, such as permissions, encryption, access control lists, and network file systems. Operate systems, including booting into different run levels, identifying processes, starting and stopping virtual machines, and controlling services. Support for application installation, licenses management, software tracking/distribution and backup/recovery of system configurations and user data files. Maintain up-to-date Configuration Control and adhere to all Configuration Management requirements for all firmware, software, and hardware associated with the classified and unclassified PMRF networks. Understand and use essential tools for handling files, directories, command-line environments, and documentation. Prepare and submit status reports, and technical briefs, as required, to supervisor, senior management, and customers. Use automated installation methods and system imaging (e.g., MECM, VMware). Use cryptographic log-on methods (e.g., PKI). Analysis, design, and implementation of modifications to the system software to improve system performance by correcting errors. Participation in planning new hardware acquisitions, interacting with vendors, educating customers, and communicating and collaborating with other projects within the organization. Using shell scripting to automate system maintenance tasks. Perform system asset/property accountability and license management within specifications of PMRF contract. Assist and support lab environment testing/buildouts with senior team members. Perform other duties as assigned. Additional Responsibilities Lifting, pushing, and pulling over 25 - 50 lbs. Work positions requirements: walking, standing, sitting, crawling, kneeling or cramped. Work requiring repeated stooping, or frequent climbing. Working environment activities: customer contact, extended workday, confined work area, office laboratory, field assignment, and inclement weather. Minimum Qualifications High School or equivalent. Two years’ experience in Information Technology. Advance certifications or education may be substituted for experience. 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. Must be capable of working in a team environment and participate in technical and system administrative activities throughout project life cycles. Critical thinking - Proven problem solver. Good written and oral communication skills are required including ability to organize. Knowledge of IT systems, including Windows Modern Desktop, RHEL, and infrastructure concepts – Windows Server and/or VMware certifications. Preferred Knowledge of Cyber Security Methods and Techniques. Preferred Certifications DOD 8570.1M IAT Level I required prior to start. One of the following OS Certifications required prior to start (subject to change based on industry, DoD or local policy requirements) Linux+ or Red Hat Certified System Administrator (RHCSA) Azure Administrator Associate (AZ-104 exam) Windows Server Hybrid Administrator Associate (AZ-800 & AZ-801 exams) 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 $75K - $90K 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 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 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. Job Posting Information Original Posting: 10/20/2026 - 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. Equal Opportunity Employer 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. Additional Information If you need a reasonable accommodation for any part of the employment process, please complete our Accommodation Request. Requests for accommodation will be considered on a case‑by‑case basis. If you need assistance, please reach out to View email address on click.appcast.io For more than 100 years, Amentum has tackled the world’s toughest challenges to deliver agile and steadfast solutions to the U.S. government and its allies. With more than 50,000 employees on all seven continents and in more than 60 countries, Amentum delivers a broad range of operational support services to meet the critical needs of our clients. Our headquarters are in Chantilly, VA. Find us online at #J-18808-Ljbffr