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# System Administrator, Senior

- **Company:** Parsons Corporation
- **Location:** Linthicum Heights, MD, United States
- **Experience:** Expert
- **Salary:** $148,300.0 - $266,900.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Cyber Security, System Configuration, VMware ESX Servers, Interoperability, Local Area Networks, Linux System Administration, NetApp Applications, VMware Virtualization, Network Routers, Data Storage Management, Vcenter, Nessus, Hardware Infrastructure, Network Server, Vmware
- **Published:** June 10, 2026
- **Apply:** https://www.clearancejobs.com/jobs/8965247/system-administrator-senior

## About the Role

* Bachelor's degree in a technical discipline and 15 years' experience as a System Administrator, OR High school diploma and 20 years' experience as a System Administrator
 * Experience with Windows Sever Administration, Active Directory, and Group Policy
 * Familiarity with Linux Server Administration
 * Familiarity with VMware/ESXi, VMWare Virtual Networking, and VMware vCenter
 * Networking Switching and Router Management
 * Storage Management (NetApp)
 * Hardware and Operating System troubleshooting
 * System hardening
 * Security Compliance Scanning (Nessus, ACAS)
 * Understanding of project design within the scope of security (RMF) requirements
 * Active TS/SCI security clearance with polygraph
 * Active DoD IAT Level II certification (e.g. CCNA-Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP)
 * Ability to demonstrate cyber/IT related experience with attention to detail, customer service, oral and written communication, and problem solving.

## Description

Our National Security Solutions team needs a Sr. System Administrator to support our expanding portfolio of work in the Intelligence Community (IC). As a collaborative member of a small and mostly autonomous team, this position directly supports secure enclave development networks.

Core Tasks :

 * Conduct functional and connectivity testing to ensure continuing operability.
 * Develop and document systems administration standard operating procedures.
 * Maintain baseline system security according to organizational policies.
 * Manage accounts, network rights, and access to systems and equipment.
 * Plan, execute, and verify data redundancy and system recovery procedures.
 * Install, update, and troubleshoot systems and servers.
 * Comply with organization systems administration standard operating procedures.
 * Implement and enforce local network usage policies and procedures.
 * Manage system and server resources including performance, capacity, availability, serviceability, and recoverability.
 * Monitor and maintain system and server configurations.
 * Perform repairs on faulty system and server hardware.
 * Troubleshoot hardware/software interface and interoperability problems.


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