Senior Linux SysAdmin – TS/SCI Clearance

Independent Software, Inc.; Annapolis (MD); On-site; USD 100,000 - 140,000; Full time

Job summary

Independent Software is seeking a Linux System Administrator, Level 3, in Annapolis Junction. You will manage mission-critical Linux/Windows systems, support DevOps, monitor health, and ensure STIG-compliant security across multi-environment infrastructure.

You will collaborate with government personnel and engineers to resolve issues, support back-end environments at multiple classification levels, and maintain core services and network configurations while contributing to mission success.

Qualifications

• Linux system administration experience appropriate to the position level.
• Solid experience with STE/STN environments and DISA STIG compliance on Linux systems.
• Storage management experience, including CFS/DFS and NetApp.
• Experience with virtualization technologies such as Proxmox, Red Hat KVM, or VMware.
• Knowledge of IP networking and firewall administration.
• Experience working with containers or cloud environments.

Responsibilities

• Administer, maintain, and troubleshoot Linux and Windows servers, including physical and virtual systems.
• Support DevOps activities and sustainment of live, mission-critical systems.
• Monitor system health, investigate issues, and resolve incidents and service requests using JIRA.
• Maintain infrastructure services, including authentication, DNS, shared drives, home directories, and network communications.
• Support backend environments across multiple classification levels, including mission and operations users.
• Implement and maintain DISA STIG compliance and system security configurations.
• Manage storage systems, virtualization platforms, IP networking, and firewall configurations.
• Collaborate with System Administrators, System Engineers, Network Engineers, and government stakeholders to resolve technical issues and support mission requirements.
• Communicate system updates, technical challenges, and operational priorities across multiple teams and contracts.

Skills

Linux admin

STIG compliance

Storage management

Virtualization

IP networking

Containers

Education

Bachelor's degree or higher in a technical field

High School Diploma/ GED or Associate's Degree

Tools

Proxmox

Red Hat KVM

VMware

DNS

JIRA

Job description

Independent Software is seeking a Linux System Administrator, Level 3, in Annapolis Junction. You will manage mission-critical Linux/Windows systems, support DevOps, monitor health, and ensure STIG-compliant security across multi-environment infrastructure.

You will collaborate with government personnel and engineers to resolve issues, support back-end environments at multiple classification levels, and maintain core services and network configurations while contributing to mission success.