System Administrator

Leidos • Norfolk, VA

7d • $87,100 - $157,450 • Onsite

About The Position

Leidos is seeking a mission-oriented Senior System Administrator to join its enterprise IT operations team in Norfolk, Virginia. The role guides a team in provisioning, installing, configuring, operating, and maintaining system hardware, software, and related infrastructure. It supports the health, availability, and security of defense and enterprise networks while ensuring systems and procedures meet organizational values and rigorous security standards. The position calls for strong mentoring and technical skills, a proactive approach to security compliance, configuration automation, and system monitoring, and the ability to work collaboratively in a dynamic environment. Self-motivation and punctual attendance are expected.

This is a 100% on-site position. The work schedule may extend to evenings, nights, weekends, and occasional holidays. Candidates must be U.S. citizens and hold an active DoD Secret clearance and a current DoD 8570.01-M IAT Level II certification. Current or previous SMIT NMCI experience is also required. Compensation is listed as $87,100–$157,450; the stated pay range is a general guideline and not a guarantee.

Requirements

• Must be a United States citizen.
• Must possess and maintain an active Department of Defense Secret security clearance.
• Must hold a current DoD 8570.01-M Information Assurance Technical (IAT) Level II certification, such as CompTIA Security+ CE, CySA+, CCNA Security, GSEC, or SSCP.
• Must have current or previous SMIT NMCI experience.
• Bachelor’s degree or equivalent experience.
• At least 4 years of progressive experience in system administration, enterprise infrastructure management, server operating systems (Windows/Linux), or virtualized environments.
• Strong mentoring skills and technical expertise in system infrastructure administration.
• Proactive approach to security compliance, automated configuration management, and system monitoring.
• Excellent self-motivation and punctual attendance.
• Available to work schedules extending to evenings, nights, weekends, and occasional holidays.

Nice To Haves

• CompTIA Network+ certification.
• Active Microsoft AZ-900 certification.
• Operational familiarity with DISA STIGs, RMF processes, automated vulnerability management platforms such as ACAS/Nessus, and federal compliance frameworks.
• Hands-on experience developing automation or configuration-management routines using PowerShell, Ansible, Jenkins, and version-control repositories such as Bitbucket.

Responsibilities

• Administer, monitor, and maintain physical and virtual servers, operating systems, and enterprise storage to support operational efficiency and minimize downtime.
• Apply STIGs to operating systems, applications, and network devices, and maintain security in alignment with RMF.
• Conduct vulnerability scans, analyze results, and perform timely patching, remediation, and mitigation.
• Develop, test, and implement automation scripts and workflows for system provisioning, deployment, and configuration management.
• Manage enterprise backup and recovery procedures and routinely test data integrity and failover systems.
• Provide Tier III system administration support to diagnose and resolve complex infrastructure issues.
• Create and maintain system topology documentation, standard operating procedures, and configuration logs.
• Guide and mentor a team in system infrastructure administration.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior