Sr. Systems Administrator TS/SCI Poly
Sr. Systems Administrator TS/SCI Poly
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$ 112450 - 203275
1 Vacancy
Job Description
Leidos has a new and exciting opportunity for a System Administrator in our National Security Sectors (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering Computer Network Operations (CNO) Mission Software Analytical Methods and Modeling Signals Intelligence (SIGINT) and Cryptographic Key Management. At Leidos we offer competitive benefits including Paid Time Off 11 paid Holidays 401K with a 6% company match and immediate vesting Flexible Schedules Discounted Stock Purchase Plans Technical Upskilling Education and Training Support Parental Paid Leave and much more. Join us and make a difference in National Security!
Job Summary:
The selected individual will be responsible for maintaining system administration support activities for a large complex network environment with geographically distributed systems. The position entails supporting solutions for system engineering requests that meet operational needs as well as upgrading and maintaining capabilities. The selected candidate must be comfortable working in a fast-paced environment with multiple air-gapped systems which have individual domains and supporting infrastructure and with maintaining a complex IT environment with multiple logins and associated supporting storage and network infrastructure. The role requires an energetic focused and driven individual who can adapt well to a changing environment. The selected candidate must possess strong system administration and troubleshooting skills and must adapt quickly in working with the team to undertake various system administration network-centric tasking.
Responsibilities Include:
You will be responsible for installing and administrating systems applications and processes and for ensuring that all issues are identified and resolved in a timely manner. You will be responsible for ensuring server and desktop configurations are optimized and running continuously and efficiently. The individual will also perform security management and application performance optimization functions. Additional responsibilities may include:
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:
BS degree and 12 15 years of prior relevant experience or Masters with 10 13 years of prior relevant experience. May possess a Doctorate in technical domain.
Must have experience as a systems administrator providing direct support to end users and technical staff (developers testers engineers etc.).
Must be proficient with Windows Server 2012Rand Active Directory.
Must have experience with Linux and Microsoft-based servers and workstations.
Must have experience with Windows 2019.
Must have experience with OS and Application Hardening to include DISA Best Practices and High Assurance environments.
Must have experience with software/hardware deployment patches and operating systems and basic system backup and restore functions.
Must have experience with and/or be familiar with SALT Ansible Splunk Puppet SolarWinds Nessus.
Must have experience with and/or have knowledge of Red Hat 7 and 8 and VMWare.
Must have experience with Apache Tomcat IIS and/or SQL server database.
Must have experience documenting and providing information for security accreditation and certification.
Must have a solid understanding of advanced security protocols and standards.
Must have experience with Network Security Technologies (e.g. Multiple Domain PKI SSP and Vulnerability Assessment).
Must have experience with High Assurance platforms and application integration testing methods.
Must have experience with both Client and Server virtualization environments.
Must be able to lift up to 50 lbs.
Must have experience with installation configuration troubleshooting and reimaging hardware.
Must have experience with disk arrays PowerShell and PowerCLI KVMs
Must have knowledge of PKI systems which use HSMs to validate key and NTP for synchronization.
Must have experience optimizing system operations.
Must have a solid understanding of information security principles and practices.
Must have experience with or familiarity with software and security architectures.
Must have experience or familiarity with the following systems: Windows/Linux operating systems VMware and Networking: Switches Routers LANs & cabling.
Must be able to support occasional day or short duration travel if needed.
Clearance Required: Must have TS/SCI with Polygraph.
Preferred Qualifications:
Proficiency with SQL Server desired.
At Leidos the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us helping you grow your career is good business. We look forward to learning more about you apply today.
Posting:July 22 2025
For U.S. Positions: While subject to change based on business needs Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $112450.00 - $203275.00The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.
Required Experience:
Senior IC
Employment Type
Full-Time
