System Administrator (RHEL)

• Provide maintenance, sustainment, installation, configuration, patching, troubleshooting, break-fix, data protection, and vulnerability remediation for RHEL 8 & 9 systems running in Azure Government Cloud across multiple US Gov regions.
• Scale and maintain RHEL environments, including deploying and upgrading virtual machines, supporting hybrid cloud configurations, and managing servers, clusters, highly available infrastructures, and RHEL endpoints.
• Support and administer critical services including LDAP, SYSLOG, DNS/BIND, JAVA, NTP, SMTP/Mail Relay, and RHEL patching.
• Maintain full DISA STIG compliance, complete STIG checklists, run SCAP/eVALUATE scans, identify vulnerabilities, and remediate findings.
• Maintain and administer Red Hat Satellite Server (or approved services) to manage updates, package distribution, and system configuration.
• Provision, configure, and maintain Azure Dedicated Hosts and Host Groups for hardware isolation supporting IL2, IL4, and IL5 workloads.
• Manage backup and disaster recovery solutions using Azure Backup, Recovery Services Vaults, snapshots, or approved services, ensuring compliance, application consistency, business continuity, and cost optimization.
• Configure and maintain Azure Hybrid Benefits for RHEL servers.
• Support RMF Steps 1–6 to meet ATO requirements and maintain system accreditation timelines.
• Ensure ongoing STIG compliance, routine patching execution, and security control monitoring aligned with SCCA requirements.
• Manage and update Plan of Action & Milestones (POA&Ms), ensuring vulnerabilities are tracked, mitigated, and resolved within required timeframes.
• Conduct continuous monitoring of systems following the approved System Level Continuous Monitoring (SLCM) strategy.
• Review ACAS scan results and update POA&Ms in accordance with DoD and DON standards.
• Maintain hardware/software inventory and system assessment documentation, updating annually or upon environmental changes.

• Active DoD Secret clearance or higher.
• Active IAT Level II Certification or higher.
• Bachelor’s degree in Information Technology, Computer Science, Cybersecurity, or a related technical field.
• 3–5+ years of experience administering RHEL 8/9 environments.
• Strong hands-on experience with Azure Government Cloud, Azure VMs, and Azure Dedicated Hosts.
• Experience with DoD cybersecurity requirements including DISA STIGs, SCAP, ACAS, and RMF activities.
• Proficiency managing RHEL services such as LDAP, SYSLOG, DNS/BIND, NTP, JAVA, and SMTP.
• Experience with backup technologies and disaster recovery in cloud environments.
• Familiarity with hybrid cloud architectures and highly available systems.

• ​​​​​Experience with Red Hat Satellite Server administration.
• Azure OR Red Hat certifications such as:
  • AZ-104: Azure Administrator
  • AZ-900: Microsoft Azure Fundamentals
  • AZ-305: Azure Solutions Architect
  • RHCSA: Red Hat Certified System Administrator
  • RHCE: Red Hat Certified Engineer
• Experience supporting Navy, NAVFAC, DISA, or other DoD organizations.
• Experience working with Impact Level (IL2/IL4/IL5) systems.

More about DT Professional Services:

We’re looking for driven individuals to contribute to our talented & innovative team! At DT Professional Services, we offer insurance benefits that include medical, dental, and vision coverage, life insurance, long & short-term disability, 401(k) retirement plans (with employer match), tuition & certificate reimbursement, along with paid time off (vacation/sick/holidays). We are happy to to offer growth opportunities for you to grow in your career - your success is our success!

DT Professional Services is an SBA 8(a) and HUBZone certified Small Business; highly experienced in building award-winning custom software solutions. Established in 2013, we bring over a decade of experience delivering technology services and solutions that specialize in web & custom application development, project & program management, mobile & cloud computing services.

Our Mission is to provide cutting-edge, customer-oriented technology solutions that maximize value, drive engagement, and empower your business. We do this by employing talented & driven individuals who share the same goals and excitement for the work we do. DT Professional Services believes in fostering collaboration, career growth and building lasting relationships with our employees.