Senior Systems Administrator - TS/SCI with Poly

Leidos; Harrogate; On-site; GBP 50,000 - 75,000; Full time

Job summary

Leidos is seeking a Senior Systems Administrator to manage critical IT infrastructure across laboratory environments. This role involves configuring servers, maintaining network file systems, and providing technical support within mission-driven projects. The ideal candidate will have extensive experience in systems administration and hold a TS/SCI clearance, ensuring reliable and secure operations.

Benefits

Competitive salary

Health and wellness programs

Retirement plans

Flexible work options

Professional development access

Qualifications

• 8+ years of related experience or 6+ years with a Master's degree.
• Active TS/SCI with Poly security clearance.
• 5+ years in systems administration, handling complex environments.

Responsibilities

• Oversee configuration and maintenance of servers and networks in lab environments.
• Troubleshoot hardware, software, and network issues to minimize downtime.
• Document system configurations and support procedures.

Skills

Problem-solving

Collaboration

Networking principles

Troubleshooting

Coding knowledge

Education

Bachelor's degree

Master's degree

Tools

AWS

Azure

Google Cloud

VMware

Hyper-V

Job description

Senior Systems Administrator - TS/SCI with Poly

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Description

Leidos is seeking a highly skilled

Description

Leidos is seeking a highly skilled Senior Systems Administrator to support mission-critical operations across various laboratory environments. This role focuses on acquiring, configuring, and maintaining computer servers, operating systems, networks, and network file systems to address complex mission-specific challenges. The Senior Systems Administrator will work in dynamic lab settings, providing technical expertise, troubleshooting, and support to ensure reliable and secure IT infrastructure for mission-driven projects. The role requires adaptability, strong problem-solving skills, and the ability to collaborate with cross-functional teams to meet diverse mission requirements.

Key Responsibilities

• Acquire, configure, and maintain computer servers, operating systems, networks, and network file systems in lab-based environments to support mission objectives.
• Upgrade, install, and configure application software and computer hardware to ensure optimal performance for mission-critical systems.
• Troubleshoot and provide technical support to lab users, resolving hardware, software, and network issues promptly to minimize downtime.
• Create and manage system permissions and user accounts, ensuring secure access control across lab systems.
• Perform regular security tests and monitoring to maintain the integrity and confidentiality of mission-critical systems and data.
• Maintain and optimize networks and network file systems, ensuring interoperability and performance in diverse lab environments.
• Leverage knowledge of coding and cloud computing to enhance system configurations and support mission-driven applications.
• Collaborate with lab teams, mission stakeholders, and technical staff to define system requirements, implement solutions, and meet project milestones.
• Adapt to evolving mission needs across multiple lab locations, addressing technical challenges under tight timelines.
• Document system configurations, processes, and troubleshooting procedures to support mission continuity and compliance.
  
  

Required Qualifications

• Bachelor’s degree with 8+ years related experience or Master’s degree with 6+ years. Additional experience maybe considered in lieu of a degree.
• An active TS/SCI with Poly security clearance.
• At least 5 years’ experience in systems administration, including configuring and maintaining servers, operating systems, and networks.
• In-depth expertise in acquiring, configuring, and maintaining computer servers, operating systems, and network file systems.
• Strong knowledge of networking principles, including TCP/IP, DNS, DHCP, and network troubleshooting.
• Experience upgrading, installing, and configuring application software and computer hardware in complex environments.
• Proficiency in troubleshooting and providing technical support for hardware, software, and network issues.
• Familiarity with creating and managing system permissions and user accounts in secure environments.
• Experience performing security tests and monitoring to ensure system integrity.
• Knowledge of cloud computing platforms (e.g., AWS, Azure, Google Cloud) and their integration with on-premises systems.
• Strong problem-solving skills and the ability to work independently or collaboratively in dynamic lab settings.
• Excellent communication skills to interface with mission stakeholders, lab personnel, and technical teams.
  
  

Preferred Qualifications

• Experience working in laboratory environments supporting defense, intelligence, or scientific missions.
• Certifications in relevant technologies (e.g., CompTIA Security+, Microsoft Certified Systems Administrator, AWS Certified SysOps Administrator).
• Familiarity with coding or scripting languages (e.g., Python, PowerShell, Bash) for system automation and optimization.
• Experience with network file systems (e.g., NFS, SMB) and virtualization technologies (e.g., VMware, Hyper-V).
• Knowledge of mission-specific security standards or frameworks (e.g., NIST, RMF, or DoD compliance).
• Experience supporting IT infrastructure in Agile or DevOps environments.
  
  

Why Leidos?

• Mission Impact: Support critical missions in defense, intelligence, or scientific research through reliable IT infrastructure.
• Dynamic Environment: Work in cutting-edge lab settings with opportunities to tackle diverse technical challenges.
• Career Growth: Access to professional development, training, and mentorship programs.
• Comprehensive Benefits: Competitive salary, health and wellness programs, retirement plans, and flexible work options.
  
  

Original Posting

June 10, 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

The 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.

#Featuredjob

Seniority level

• Seniority level

  Not Applicable

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  IT Services and IT Consulting

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