What are the responsibilities and job description for the Linux System Admin position at Apolis?
Linux Systems Administrator
Location: Dahlgren, VA
Schedule: Hybrid (3 days onsite / 2 days remote)
Clearance: TS or Interim TS (must be able to obtain/maintain Top Secret)
Overview
Seeking a Linux Systems Administrator (UNIX) to support a Research, Development, Testing & Engineering (RDT&E) environment. This role provides Tier III support for Linux-based servers and workstations across classified and unclassified environments, supporting engineering and computational workloads.
Key Responsibilities Required Qualifications Certifications Physical Demands
Location: Dahlgren, VA
Schedule: Hybrid (3 days onsite / 2 days remote)
Clearance: TS or Interim TS (must be able to obtain/maintain Top Secret)
Seeking a Linux Systems Administrator (UNIX) to support a Research, Development, Testing & Engineering (RDT&E) environment. This role provides Tier III support for Linux-based servers and workstations across classified and unclassified environments, supporting engineering and computational workloads.
Key Responsibilities
- Administer, maintain, and support Red Hat Enterprise Linux (RHEL 7.x) systems
- Provide Tier III troubleshooting and system performance optimization
- Implement automated system deployments (e.g., Kickstart / Anaconda)
- Apply and maintain DISA STIG compliance within configuration-managed environments
- Support PKI-based authentication and secure access controls
- Administer servers and end-user workstations in classified and unclassified LAN/WAN environments
- Perform system analysis and implement solutions to improve system performance and reliability
- Install, configure, patch, and maintain operating systems and applications
- Manage users, groups, and centralized authentication services
- Configure and manage:
- Storage (partitions, LVM)
- File systems (permissions, ACLs, encryption, NFS)
- Logging (including remote logging)
- Networking services (HTTP/HTTPS, DNS, SMTP, SSH, NTP)
- Network configurations (static routes, NAT, packet filtering)
- Monitor system performance and deliver utilization and health reports
- Develop and maintain shell scripts to automate administrative tasks
- Manage backup/recovery, software distribution, and license tracking
- Collaborate with engineers supporting compute-intensive workloads
- Participate in hardware planning, vendor coordination, and cross-team collaboration
- 4–6 years of Linux system administration experience
- Experience supporting Linux-based servers and workstations
- Hands-on experience with:
- Red Hat Enterprise Linux (RHEL 7.x)
- DISA STIGs and DoD security compliance
- Strong knowledge of:
- Linux system operations and command-line tools
- Networking fundamentals in LAN/WAN environments
- System security (firewalls, SELinux, access controls)
- Experience in classified and/or secure environments preferred
- Strong troubleshooting, analytical, and problem-solving skills
- Ability to multi-task and provide end-user support
- Strong written and verbal communication skills
- DoD 8570/8140 IAT Level II certification required
- Acceptable certifications include: Security CE, GSEC, SSCP, CCNA-Security (or equivalent)
- Ability to lift up to 10–20 pounds
- Ability to stand and walk for extended periods
- Ability to bend, twist, and squat periodically
Salary : $58 - $60