Senior Linux/Unix Administrator (5195)

SMX

2d•$87,600 - $146,000•Onsite

About The Position

SMX is seeking a driven and experienced Senior Linux/UNIX Administrator to support operations at the Patuxent River Data Center (PRDC). This individual will work alongside a team of UNIX/Linux Systems Administrators responsible for maintaining the integrity, availability, and security of mission-critical systems across Department of Defense (DoD) networks. The Senior Linux/UNIX Administrator will ensure systems are properly patched and configured in accordance with defined security baselines and hardening policies. Core responsibilities include resolving incidents and service requests in a timely manner and contributing to projects involving diverse systems and applications throughout the data center environment.

Requirements

Clearance Required: Top Secret
Secret required to start
5+ years of relevant IT experience
Work Location: On-site two (2) days per week at Patuxent River, MD (PRDC)
Baseline Certification: Security+ (or equivalent IAT LevelIl certification) required to start
Proficient with UNIX/Linux environments, including RHEL 8/9 and Solaris
Experience with AWS core services such as EC2, S3, VPC, IAM, SSM, and AWS Systems Manager Distributor
Proficiency with BASH shell scripting
Experience with Red Hat Satellite or Foreman
Working knowledge of DoD IA practices, including Security Technical Implementation Guides (STIGs) and the Risk Management Framework (RMF)
Strong analytical skills and the ability to resolve complex, multi-layered technical issues using vendor documentation and in-house tools
Clear and concise verbal and written communication skills
Ability to work both independently and in a team environment across multiple assignments
Comfortable engaging directly with customers, peers, and leadership in a dynamic and evolving data center setting

Nice To Haves

Familiarity with Identity Management (IdM) solutions
Experience with Ansible and YAML playbooks
Bachelor's degree in a related technical field
Experience with Red Hat Identity Management (IdM) or Free|PA
Broader exposure to AWS beyond core services
Senior-level experience with Solaris system administration

Responsibilities

Support operating system and security patching efforts across multiple Department of Defense (DoD) enclaves
Mentor and support junior UNIX/Linux System Administrators by providing technical guidance on task execution, project involvement, and adoption of new technologies
Collaborate with other Data Center teams to design and implement Unix/Linux-based solutions that align with business and mission requirements
Develop, maintain, and improve Ansible playbooks and administrative shell scripts (primarily BASH), both independently and as part of a team
Diagnose and resolve complex technical issues involving applications, server hardware, firmware, operating systems, and storage, working across functional teams and vendors
Participate in a rotating on-call schedule to support operational continuity
Take ownership of system outages, drive resolution, and provide timely, clear communication on status and outcomes
Manage incidents and service requests through the ticketing system, ensuring resolution is completed accurately and on time
Participate in technical meetings with customers to gather requirements and provide input on architecture and project solutions