{"id":3246741,"url":"https://alion.io/job/mitre-senior-system-administrator","title":"Senior System Administrator","company":{"id":37980,"name":"MITRE","domain":"mitre.org","url":"https://alion.io/company/mitre","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Phenom","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["El Segundo, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":99200,"max":124000,"currency":"USD","period":"year","gross":null,"usd_annual":124000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Debian","optional":false},{"name":"Docker","optional":false},{"name":"GitLab","optional":false},{"name":"Grafana","optional":false},{"name":"Hyper-V","optional":false},{"name":"Linux","optional":false},{"name":"Prometheus","optional":false},{"name":"Proxmox VE","optional":false},{"name":"Ubuntu","optional":false},{"name":"VMWare","optional":false},{"name":"Windows","optional":false},{"name":"Ansible","optional":true},{"name":"Bash","optional":true},{"name":"Chef","optional":true},{"name":"PowerShell","optional":true},{"name":"Python","optional":true}],"status":"live","first_seen_at":"2026-10-23T00:00:00Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-31T07:48:02Z","board_verified":true,"closed_at":null,"days_open":8,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":8},"description":"At MITRE, your passion fuels work that impacts our nation and improves lives. This is where your skills strengthen national security, cybersecurity, health, transportation, and citizen services. We’re a nonprofit engineering, applied research, and advanced technology organization working in the public interest. With objectivity and integrity at our core, we lead federally funded research and development centers for U.S. government agencies - collaborating with industry and academia to deliver integrated, high-impact solutions that advance our nation’s health, security, and prosperity. Our people tackle the toughest technical challenges, supported by competitive benefits, meaningful career development, and a culture of innovation, collaboration, and technical excellence. Choose MITRE for a career with purpose - and help shape the future.The R310 Classified Systems Engineering Department delivers secure, mission-critical information technology services for classified research and operations, ensuring highly controlled computing environments remain reliable, compliant, and available.\nThe department designs, operates, and sustains classified infrastructure, including systems, networks, storage, and access controls, while meeting stringent security and regulatory requirements. In parallel, R310 actively reduces risk and technical debt, mitigates compliance drift, and modernizes platforms to support evolving mission needs, enabling classified programs to execute with confidence, resilience, and operational focus.\nRoles & Responsibilities:\n\nThe team seeks a full-time Systems Administrator to support the deployment, operation, and maintenance of IT systems in a classified lab environment. This role is best suited for someone who has prior experience working as a classified IT Systems Administrator. This is an on-premises position in our Los Angeles, CA facility. The successful candidate will have experience in:\nPatching and updating Windows and Linux (RHEL, Ubuntu) server and desktop operating systems\nPerform general systems administration (patching, updates, user support) of: Windows & Linux desktops and servers\nNetwork switches (preferred)\nVMware ESXi, Proxmox (Debian), Microsoft Hyper-V platforms\nNetwork Storage Systems\nRepository mirrors, such as: VSCode, Docker, Pypi\nBackup and recovery/disaster recovery platforms such as Commvault\nMaintenance of other systems/services according to project needs (SIEMs, Gitlab, Prometheus/Grafana and other monitoring tools, miscellaneous web servers, etc.,)\n\nBuilding and hardening Windows, Linux, virtualization (VMWare, Proxmox, Hyper-V) systems\nSupport procurement, management and accountability of Classified IT hardware and property Design future IT infrastructure upgrades to support changing site needs\nTrack equipment location, status, and movement into/out of classified spaces; maintain records to support audits and inventories\nMaintain a company purchase card; manage classified equipment and subcontract purchases IAW acquisition policies\nCoordinate equipment installation, disposition, turn-in, or destruction activities as necessary with other Global Security teams and relevant stakeholders\nPlan and execute equipment moves and transfers associated with facility transitions ensuring proper approvals and documentation are maintained\n\nSupport Site Operations team in day-to-day security operations. Assist with escorting cleared and uncleared visitors\nAssist in opening and closing the site’s classified spaces\n\nMonitor power and HVAC status impacting classified spaces; coordinate repairs with facilities manager and assistant site lead during outages; notify affected project personnel of outages, impacts, and restoration timelines\n\nBasic Qualifications:\n\nTypically requires a minimum of 5 years of related experience with a Bachelor’s degree; or 3 years and a Master’s degree; or a PhD with relevant experience who can immediately contribute at this job step; or equivalent combination of related education and work experience.\nWorking knowledge of server and client operating systems. (Win11, Srv22/25, RHEL 8+, Ubuntu Linux 22.04+) \nFundamental understanding of lab IT architecture. \nFundamental understanding of VOIP and VTC systems and their troubleshooting.\nFundamental understanding of system administration, network, and operating system hardening techniques. \nFundamental understanding of operating system command-line tools. \nAbility to interface with customers and provide a high level of customer service both written and verbal.\nAbility to function effectively in a dynamic, fast-paced environment.\nAbility to collaborate effectively with others.\nMust have an active Top Secret U.S Government issued Security Clearance with the ability to obtain and maintain a Top Secret/SCI U.S. Government issued Security Clearance. Per the U.S. Government’s eligibility requirements, you must be a U.S Citizen to be considered for a security clearance.\nThis position has an on-site requirement of 5 days a week on-site.\n\nPreferred Qualifications:\n\nActive TS/SCI with CI Poly Security Clearance.\nSecurity+ Certification / 8570 Certification - IAT Level II or meets 8140 requirements.\nExperience with one or more programming/scripting languages (Chef, Ansible, Powershell, Bash, Python, etc.).\nThis requisition requires the candidate to have a minimum of the following clearance(s):\nTop SecretThis requisition requires the hired candidate to have or obtain, within one year from the date of hire, the following clearance(s):\nTop Secret/SCISalary compensation range and midpoint:\n$99,200 - $124,000 - $148,800 AnnualWork Location Type:\nOnsiteCommitment to Non-Discrimination\nAll qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local or international law.\nMITRE intends to maintain a website that is fully accessible to all individuals. If you are unable to search or apply for jobs and would like to request a reasonable accommodation for any part of MITRE’s employment process, please email  for general support and  for intern positions. This service is for individuals requiring reasonable accommodation requests. Please note that vendor solicitations will not receive a reply.\nBenefits information may be found here.\nCopyright © 1997-2026, The MITRE Corporation. All rights reserved. MITRE is a registered trademark of The MITRE Corporation. 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