System Administrator with Security Clearance

What You Will Do: At Independent Software, as a Systems Administrator you will support secure, mission-critical infrastructure across Linux and mixed Linux/Windows enterprise environments. This role supports a wide range of operational systems including virtualized infrastructure, containerized platforms, cloud-hosted environments, and automated system administration solutions supporting DoD and Intelligence Community missions. Depending on experience level, you will assist with or lead system administration, troubleshooting, automation, virtualization, compliance support, and operational sustainment activities across complex enterprise environments. This position is ideal for candidates who enjoy working hands-on with Linux systems, automation tools, virtualization platforms, and secure operational environments while supporting highly available mission systems. Key Responsibilities:Deploy, configure, maintain, and troubleshoot Linux-based systems and enterprise infrastructureSupport mixed Linux and Windows operational environmentsAdminister and maintain containerized environments and virtualization platforms including ProxmoxDevelop and maintain automation solutions using Ansible, SALT, and scripting languages such as Bash, Perl, or PythonSupport system hardening, patching, upgrades, and lifecycle management activitiesMaintain compliance with SSP documentation and STE/STN security requirementsSupport cloud-hosted infrastructure and AWS-based environmentsConfigure and maintain CIFS and Centrify integrations within enterprise environmentsTroubleshoot system, application, network, and infrastructure-related issuesSupport operational monitoring, system reliability, and performance optimizationDevelop and maintain technical documentation and operational proceduresCollaborate with engineering, security, and operations teams to support mission requirementsParticipate in on-call support and maintenance activities as required Required Skills and Qualifications:Experience administering Linux systems in enterprise or operational environmentsExperience with scripting and automation using Bash, Perl, Python, or similar languagesExperience with configuration management and automation tools such as Ansible or SALTExperience with virtualization technologies such as Proxmox or similar platformsExperience supporting containerized environmentsUnderstanding of SSP compliance and STE/STN support requirementsExperience supporting cloud infrastructure and AWS environmentsExperience with CIFS and Centrify within enterprise environmentsStrong troubleshooting and problem-solving skillsAbility to work independently and collaboratively within operational teamsStrong written and verbal communication skills Education and Experience:Level 0 (SA0): No demonstrated Systems Administrator experience is required. Bachelor's degree in a technical discipline from an accredited college or university is required. Five (5) years of Systems Administrator experience may be substituted for a bachelor's degree.Level 1 (SA1): Five (5) years of experience as a Systems Administrator supporting programs and contracts of similar scope, type, and complexity is required. Bachelor's degree in a technical discipline from an accredited college or university is required. Five (5) years of additional Systems Administrator experience may be substituted for a bachelor's degree.Level 2 (SA2): Ten (10) years of experience as a Systems Administrator supporting programs and contracts of similar scope, type, and complexity is required. Bachelor's degree in a technical discipline from an accredited college or university is required. Five (5) years of additional Systems Administrator experience may be substituted for a bachelor's degree.Level 3 (SA3): Fifteen (15) years of experience as a Systems Administrator supporting programs and contracts of similar scope, type, and complexity is required. Bachelor's degree in a technical discipline from an accredited college or university is required. Five (5) years of additional Systems Administrator experience may be substituted for a bachelor's degree. Preferred Qualifications:Experience administering Windows Server environmentsExperience supporting Windows Domain ControllersExperience supporting Microsoft Exchange environmentsExperience supporting secure DoD or Intelligence Community systemsExperience supporting mixed-platform enterprise environments Certifications:A DoD 8570 IAT Level II baseline certification) is required 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 matterBe part of a close-knit, employee-first culture where your voice is heardExpand your skills through ongoing training, mentorship, and career developmentEnjoy competitive compensation, generous benefits, and work-life balance Ready to take the next step in your career? Join us and be part of something bigger. Apply today. 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.