Systems Administrator

Amentum is seeking a System Administrator Professional to support the Space Force Range Contract (SFRC). Key Responsibilities: System Administration: Configure, manage, and troubleshoot a variety of systems, including Windows and Linux servers and workstations, as well as network infrastructure such as routers, switches, and firewalls. Troubleshooting and Support: Provide expert-level technical support to identify, analyze, and resolve complex hardware, software, and network issues. This includes serving as an escalation point for user-reported problems (Tier 1 and 2). System Monitoring and Maintenance: Proactively monitor system performance, resource utilization, and network traffic to identify and address potential issues. Perform routine preventative maintenance, backups, and recovery operations to ensure data integrity and operational continuity. Works with the Cybersecurity team to implement and maintain cybersecurity measures in accordance with Department of Defense (DoD) directives. This includes applying Security Technical Implementation Guides (STIGs), managing vulnerabilities, responding to incidents, and ensuring systems maintain their Authority to Operate (ATO) under the Risk Management Framework (RMF). Write procedures and/or reports, as applicable, to support existing or new processes, or as required to summarize data collected during engineering level testing. Perform other tasks as assigned Minimum Qualifications: Bachelor’s degree in information technology, computer science, cybersecurity, or a related field and three years of relevant experience; or an equivalent combination of education, professional certifications, training, and seven years of progressively responsible systems administration experience. 3+ years’ work experience in Information Technology. A current DoD 8140 IAT Level II (or higher) certification (CompTIA Security+ CE, etc). Strong experience with both Windows and Linux operating systems. Hands-on experience with network hardware (e.g. HP, Cisco, Juniper, Palo Alto, Cornet, NetAcquire) and enterprise services (Active Directory, DNS, DHCP). Experience with managing and maintaining virtual server platforms. Proficiency in Microsoft Office products. Ability to communicate effectively in both oral and written form. Ability to quickly identify and solve technical problems. Ability to lift 50lbs. Ability to support occasional travel. The flexibility to work non-duty hours and weekends to support specific project or mission requirements. Must possess or be able to obtain and maintain a DoD Secret Security Clearance, which includes U.S. citizenship. Valid U.S. Driver’s License Preferred Skills and Qualifications: Other certifications such as CCNA, MCSA, or specific Linux/VMware credentials. Experience with or knowledge of serial data communications, fiber optics, multiplexing, data switching, digital voice systems and Time Division Multiplexing (TDM) technologies. Experience with various types of test equipment including but not limited to cable testers, tone generators and probes, network analyzers, signal verifiers and multifunctional network test devices. Knowledge of or experienced in Western Range operations at Vandenberg Space Force Base Salary and Other Compensation The annual starting salary for this position is between $90,000 – $95,000 annually. Factors which may affect starting pay within this range include geography/market, skills, education, experience, and other qualifications of the successful candidate. Compensation Details: $90,000 to $95,000 annually 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: 10/08/2026 - 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. 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