What are the responsibilities and job description for the Unix Systems Administrator (US Citizen, Secret Clearance) position at ITfrastructure, Inc. (d/b/a ITinfra)?
Position Overview:
We are seeking an experienced Senior Systems Administrator to support the Defense Logistics Agency (DLA) in UNIX/Linux environments. This role includes system deployment, configuration, cybersecurity compliance, performance tuning, customer support, and program oversight for global mission-critical IT infrastructure.
Key Responsibilities:
- Administer, configure, and maintain UNIX/Linux (Red Hat, Solaris, HP-UX) systems across virtual and standalone environments.
- Implement system upgrades, security patches, and STIG-compliant configurations in accordance with DLA policies.
- Manage user/system accounts using Red Hat Identity Manager (IDM) and support ACAS scanning and vulnerability remediation.
- Install and support COTS applications (e.g., Splunk, HBSS, ArcSight) and monitor performance, logs, and alerts.
- Troubleshoot complex issues involving system performance, integrity, and security for both NIPRnet and SIPRnet environments.
- Provide Tier II/III technical support and maintain CRM, SLA, MOU/MOA, and escalation documentation across CONUS/OCONUS.
- Support RMF/DIACAP security assessments, accreditation readiness, and compliance with DoD, NIST, and DLA cybersecurity frameworks.
- Assist in planning, executing, and closing out IT infrastructure projects, including briefings and documentation deliverables.
- Conduct technical reviews and recommend enhancements to improve efficiency, reduce costs, and support transitions or consolidations.
- Ensure change management compliance, and maintain system audit trails, incident reports, and IAVM responses.
- Participate in the development of enterprise tools and benchmarking templates to support infrastructure planning.
- Conduct IA Control Validation (IACV) reviews, audit trail evaluations, and vulnerability scans on a recurring basis.
Minimum Qualifications (Must Have):
Experience:
- A minimum of seven (7) years of progressive systems administration experience on UNIX operating systems: Red Hat Enterprise Linux (RHEL), Solaris, or HP-UX.
- Relevant RHCSA or CompTIA Linux certification from a nationally recognized technical authority.
Security Clearance:
- Active Secret.
Why ITinfra?
- Small, growing, dynamic and fun company to work with.
- Engineer-driven company.
- We emphasize and foster professional growth by helping you set and achieve professional goals.
- Competitive compensation.
- Exceptional health insurance benefits.
- 401K, Paid Time Off (PTO).
