UNIX/Linux OS Administrator
About The Position
GDIT is seeking a UNIX/Linux OS Administrator to make meaningful contributions that fuel critical outcomes for some of the most complex government, defense, and intelligence projects. This role is crucial for supporting the mission of USSTRATCOM, a Combatant Command responsible for strategic deterrence, nuclear operations, and enterprise IT services essential to national security. The SCITLS team will ensure mission success and the safety of the U.S. and its allies by providing 24/7 IT services and network support for NIPRNet, SIPRNet, JWICS, and SAP/SAR environments. The administrator will perform systems administration for enterprise Linux/Unix solutions, install, configure, and maintain operating systems, and analyze and resolve problems associated with servers, hardware, applications, and software. This role also involves monitoring system performance, ensuring compliance with security standards, evaluating server resource availability, and assisting with virtual machine configuration and backup procedures. Additionally, the administrator will maintain patch releases, design patch installation strategies, and provide Tier 2 and 3 troubleshooting support. A key responsibility includes conducting Security Technical Implementation Guide (STIG) compliance assessments and hardening Linux systems according to DoW standards.
Requirements
- BS degree; may be substituted for additional years of experience
- 3+ years of IT/DoW systems administration experience
- Must have a current/active Top Secret clearance with the ability to obtain TS/SCI status
- ITIL 4 Foundation certified within 9 months of start
- GFACT or CND or Security+ or GSEC certification
- Strong experience with Linux distributions (RHEL, CentOS, Ubuntu, SUSE)
- Experience with VMware, Hyper‑V, KVM, or cloud‑based VMs
- Understanding of security hardening standards (DISA STIGs, CIS benchmarks)
- OS patching and vulnerability remediation
- SELinux or AppArmor experience
- Managing firewall rules (firewalld, iptables)
- Secure configuration of SSH, PAM, sudo policies
- Strong troubleshooting communication (translating technical issues)
- Incident response and root‑cause analysis
- Ability to escalate and collaborate with networking, storage, and security teams
Responsibilities
- Perform systems administration for enterprise Linux/Unix solution.
- Install, configure, and maintain Linux/Unix operating systems.
- Analyze and resolve problems associated with the operating system’s servers, hardware, applications, and software.
- Monitor system performance and ensure compliance with security standards.
- Monitor everyday system, evaluate availability of all server resources, and performs all activities for Linux servers.
- Assist with configuring and deploying all virtual machines and install and provide backup to all configuration procedures.
- Maintain and monitor all patch releases, designs various patch installation strategies, and maintain all systems according to program standards.
- Provides Tier 2 and 3 troubleshooting support, interfacing the end users and other technical teams from a service support perspective.
- Conduct Security Technical Implementation Guide (STIG) compliance assessments, harden Linux systems according to DoW standards, and ensure adherence to security policies and procedures.
Benefits
- Excellent customizable health benefits (Medical, Dental and Vision)
- 401K with company match
- Educational Assistance and eLearning
- Flexible work week
- Internal mobility team dedicated to employee advancement
- Rewards and Recognition programs
- Innovative and collaborative environment encouraging highly motivated critical thinking
- Variety of medical plan options, some with Health Savings Accounts
- Dental plan options
- Vision plan
- 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match
- Full flex work weeks where possible
- Variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave
- Short and long-term disability benefits
- Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Job Type
Full-time
Career Level
Mid Level
