System Administrator

Mid/Sr System Administrator Join us and make a difference in National Security! Job Summary The selected individual will provide system administration support for a large, complex network environment with geographically distributed systems. The role supports system engineering requests by delivering solutions that meet operational needs, and by upgrading, sustaining, and maintaining existing capabilities. The candidate must be comfortable working in a fast‑paced environment that includes multiple air‑gapped systems, each with its own domain and supporting infrastructure. The position also requires maintaining a complex IT environment involving multiple users and associated storage and network infrastructure. This role requires an energetic, focused, and driven individual who can adapt quickly to changing priorities. The candidate must demonstrate strong system administration and troubleshooting skills and work effectively with the team to execute a variety of network‑centric system administration tasks. Responsibilities The selected individual will be responsible for installing applications, administrating systems and processes, and ensuring issues are identified and resolved in a timely manner. She/he will be responsible for ensuring server and desktop configurations are optimized and running continuously and efficiently. The selected individual will also perform security management and application performance optimization functions. Additional Responsibilities Administration/sustainment of a system that provides a web‑based application for storing, sharing, and distributing information. Creating and maintaining complex server enclaves, including analyzing system scanning reports, patching, cert renewals, vulnerability management assessments, and active directory configurations. Identifying and correcting hardware and software issues. Responding to system administration, operations, and maintenance problems, and developing re‑work solutions. Creating and maintaining documentation of complex server/network environments to ensure that clear, concise and accurate information is readily available for incident resolution. Communicating with users and external support personnel regarding system outages and upgrades, and conferring with upper management regarding recommended resolution options. Basic Qualifications Bachelor’s Degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or a related technical field and at least 8 years of relevant experience. Additional experience may be substituted for a degree. Must have experience as a systems administrator providing direct support to end users and technical staff (developers, testers, engineers, etc.). Proficient with Windows Server 2012R2, 2016, 2019, and Active Directory. Experience with Linux and Microsoft‑based servers and workstations. Experience with Windows 2019. Experience with operating system and application hardening to include DISA, best practices, and high assurance environments. Experience with software/hardware deployment, patches, and operating systems, and basic system backup and restore functions. Experience with SALT, Ansible, Splunk, Puppet, SolarWinds, Nessus. Experience with Red Hat 7 and 8, and VMWare. Experience with Apache Tomcat, IIS, and/or SQL server database. Experience documenting and providing information for security accreditation and certification. Solid understanding of advanced security protocols and standards. Experience with network security technologies (e.g. multiple domain, PKI, SSP, and vulnerability assessment). Experience with high assurance platforms and application integration testing methods. Experience with both client and server virtualization environments. Experience with installation, configuration, troubleshooting, and reimaging hardware. Experience with disk arrays, PowerShell and PowerCLI, KVMs. Knowledge of PKI systems which use HSMs to validate key and NTP for synchronization. Experience optimizing system operations. Understanding of information security principles and practices. Experience or familiarity with software and security architectures. Experience with or familiarity with Windows/Linux operating systems, VMware, and networking: switches, routers, LANs, & cabling. Able to lift up to 50 lbs. Able to support occasional day or short duration travel, if needed. Clearance required: TS/SCI with polygraph. Preferred Qualifications Proficiency with SQL Server. SALT and Python scripting experience. Experience supporting a software configuration management and development environment. Experience working in an Agile development environment or on an Agile team. Pay Range $92,300.00 – $166,850.00 Benefits Competitive benefits include paid time off, 11 paid holidays, 401(k) with a 6% company match and immediate vesting, flexible schedules, discounted stock purchase plans, technical upskilling, education and training support, parental paid leave, and more. Commitment to Non‑Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any basis prohibited by law. Leidos will also consider qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr