Job Title: Senior Systems Administrator
Location: Fairfield, PA On-Site
Clearance: Active Top-Secret Clearance
Salary: $100K - $106K
Application Deadline: December 30, 2026
To apply, please visit
DescriptionThe Senior Systems Administrator is responsible for the operational stability, security and maintenance of server and network systems in the DISA Joint Service Provider Platform Services environment. The position installs and configures operating systems, provides system and network support, manages Active Directory, DNS and DHCP, performs patch management and upgrades, monitors logs, maintains backups, and ensures compliance with DoD Security Technical Implementation Guides. The senior administrator works with limited supervision, leads troubleshooting on the assigned shift, and serves as a technical resource for junior administrators.
Responsibilities- - Perform day to day maintenance and operations, including review of audit logs, backups, and maintenance of the network equipment inventory.
- - Ensure server and workstation security, apply patches and upgrades, and maintain compliance with DoD STIGs.
- - Install and configure Windows server operating systems and supporting services.
- - Manage and configure Active Directory, DNS, DHCP and VMware virtualization.
- - Provide technical support for network systems, including workstations, servers and virtual terminals.
- - Monitor system health and respond to incidents during the assigned shift; escalate and document per JSP procedures.
- - Maintain system configuration documentation and system process and procedure documentation.
- - Support DoD Information Assurance Risk Management Framework (DIARMF) activities and maintain cybersecurity standards.
- - Serve as a technical resource for junior administrators on the shift.
Required qualifications- - Active Top-Secret Clearance
- - DoD 8140 / 8570 IAT Level II certification (Security+ CE or higher), current and verified before submission.
- - Bachelor of Science in Information Technology or an engineering field.
- - Minimum 5 years of experience administering Windows server environments.
- - Experience managing and configuring Active Directory, DNS, DHCP and VMware.
- - Experience applying patches and maintaining DoD STIG compliance across servers and workstations.
- - Experience providing technical support for workstations, servers and virtual terminals in an enterprise environment.
- - Understanding of the DoD Information Assurance Risk Management Framework (DIARMF).
- - Able to work the assigned shift, including nights or weekends if the vacancy is on a non day shift.
Preferred qualifications- - Experience in a DoD or DISA 24 by 7 operations or watch floor environment.
- - Experience with ACAS, HBSS or ENS, and Tanium.
- - Experience with an enterprise ITSM ticketing system such as Remedy.
- - Scripting experience with PowerShell.
