Linux System Administrator, Level 3

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

Systems Administrator - Annapolis Junction, MD - Full Time

What You Will Do

As a Linux System Administrator, Level 3 at Independent Software, you will support mission-critical systems in a complex, multi-environment infrastructure. You will work alongside a large team of System Administrators, System Engineers, Network Engineers, and government personnel to maintain, troubleshoot, and enhance Linux and Windows systems supporting both development and operational missions. This position involves hands-on system administration, DevOps support, system monitoring, and troubleshooting across multiple classified environments.

Key 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.

What You Will Do

As a Linux System Administrator, Level 3 at Independent Software, you will support mission-critical systems in a complex, multi-environment infrastructure. You will work alongside a large team of System Administrators, System Engineers, Network Engineers, and government personnel to maintain, troubleshoot, and enhance Linux and Windows systems supporting both development and operational missions. This position involves hands-on system administration, DevOps support, system monitoring, and troubleshooting across multiple classified environments.

Key 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.

Required Skills and 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.

Desired Skills

• Experience with automation tools such as Ansible or Salt.
• Scripting experience using Bash, Python, or Perl.
• Familiarity with backup and recovery solutions such as Rubrik or NetBackup.
• Experience with hyperconverged infrastructure platforms such as Harvester, Nutanix, or Cisco HyperFlex.

Education and Experience

• High School Diploma/GED or Associate's Degree in a technical field: 20 years of relevant experience.
• Bachelor's Degree or higher in a technical field: 10 years of relevant experience.

Certifications

• Must possess a current DoD 8570/8140 IAT Level II certification

Clearance Requirement

• Must possess an active TS SCI with appropriate Polygraph to be considered for this role

Why Choose Independent Software

At Independent Software, our people are the mission. We’ve built a company around collaboration, integrity, and innovation and we make sure our team has the tools and support to grow, succeed, and thrive.

When you join us, you will:

• Support critical national security missions that matter
• Be part of a close-knit, employee-first culture where your voice is heard
• Expand your skills through ongoing training, mentorship, and career development
• Enjoy competitive compensation, generous benefits, and work-life balance

We’re an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.