System Administrator/Engineer [U.S Citizen] [TS/SCI]

About the job MeeBoss is sharing this active opportunity on behalf of the hiring company. This is a senior-level System Administrator/Engineer role based in Annapolis, MD, and Columbia, MD. The position requires an active TS/SCI+FSP security clearance and US citizenship. The role focuses on advanced operational and security-focused system administration within mission-critical environments, ensuring system compliance, supporting accreditation activities, and maintaining the reliability of enterprise infrastructure. Job title System Administrator/Engineer [U.S Citizen] [TS/SCI] Company MeeBoss Location Annapolis, MD, Columbia, MD What you will do Perform system patching and updates across Linux environments to address security findingsManage user accounts, permissions, and access controls to meet mission and security requirementsMonitor system health and performance using tools such as NagiosApply and maintain compliance with STIGs and remediate vulnerabilities identified through STE/STN findingsRenew and manage Linux server certificates and maintain current TLS configurationsSupport Security Control Assessments (SCA) by working with ISSOs and validating SCTM requirementsAutomate system administration tasks using tools such as AnsibleMaintain and update technical documentation, SOPs, and knowledge base articles in ConfluenceProvide Tier 1 and Tier 2 support, including troubleshooting and resolving system issuesSupport day-to-day operations across client, server, storage, and network systemsConfigure, manage, and maintain Linux, Windows, and UNIX operating systemsInstall, patch, and upgrade operating systems to ensure compliance and performanceTroubleshoot system and network issues and implement enhancements to improve reliabilitySupport system design and mission architecture in coordination with engineering teams What we are looking for US CitizenshipActive TS/SCI + Full Scope PolygraphBachelor’s degree in a technical discipline or equivalent combination of education and experienceIAT Level II Certification (e.g., Security+, CE, CySA+, GSEC, SSCP, or equivalent)Extensive experience with Linux system administration in secure environmentsExperience with system patching, vulnerability remediation, and STIG complianceExperience supporting Security Control Assessments (SCA) and working with ISSOsFamiliarity with SCTMs and security control validation processesExperience with monitoring tools such as NagiosExperience with automation tools such as AnsibleExperience managing certificates and TLS configurationsAbility to provide Tier 1 and Tier 2 system supportExperience administering Windows and UNIX systems About MeeBoss MeeBoss helps job seekers and hiring teams make direct, relevant career connections.