Senior System Administrator
Location
Annapolis Junction, MD
Job Type
Full-time
Category
other-general
Posted
June 17, 2026
**Worker Type**
Regular
**Job Description**
**Summary**
The System Administrator III is a senior technical contributor responsible for designing, implementing, securing, and maintaining the organization’s core IT infrastructure. This role provides Tier 3 support for complex incidents, leads infrastructure projects, mentors junior staff, and ensures high availability, performance, and security of critical systems.
**Position Responsibilities**
**Infrastructure Design & Administration**
+ Design, install, configure, and maintain servers, virtualization platforms, storage, and core services (e.g., AD, DNS, DHCP, Group Policy).
+ Manage and optimize virtualization environments (e.g., VMware, Nutanx, Hyper-V, or similar) and related storage solutions (SAN/NAS).
+ Administer Windows and/or Linux server environments, including patching, hardening, and lifecycle management.
+ Implement and maintain monitoring, alerting, an...
Regular
**Job Description**
**Summary**
The System Administrator III is a senior technical contributor responsible for designing, implementing, securing, and maintaining the organization’s core IT infrastructure. This role provides Tier 3 support for complex incidents, leads infrastructure projects, mentors junior staff, and ensures high availability, performance, and security of critical systems.
**Position Responsibilities**
**Infrastructure Design & Administration**
+ Design, install, configure, and maintain servers, virtualization platforms, storage, and core services (e.g., AD, DNS, DHCP, Group Policy).
+ Manage and optimize virtualization environments (e.g., VMware, Nutanx, Hyper-V, or similar) and related storage solutions (SAN/NAS).
+ Administer Windows and/or Linux server environments, including patching, hardening, and lifecycle management.
+ Implement and maintain monitoring, alerting, an...