Linux System Administrator Senior

ASRC Federal is a leading government contractor furthering missions in space, public health and defense. As an Alaska Native owned corporation, our work helps secure an enduring future for our shareholders. Join our team and discover why we are a top veteran employer and Certified Great Place to Work™

Agile Decision Sciences LLC is seeking a Linux System Administrator Senior with a minimum of a Secret clearance. We are committed to leveraging cutting‑edge technology and innovative solutions to support the mission of the US Army Communications‑Electronics Command (CECOM). As we continue to enhance our IT infrastructure and software capabilities, we are seeking highly skilled professionals to join our team in various key roles.

Each position plays a crucial part in maintaining and advancing our environment, ensuring seamless operations and robust support for CECOM personnel worldwide.

This is a remote role. Must be U.S. based and be able to work Monday‑Friday, 8 am to 5 pm EST.

This position supports Linux Engineering Sustainment under ASRC Federal's CECOM SETA Support within the PEO EIS MSP, in direct support of the CECOM Army Software Integration Center (ASIC). The PEO EIS MSP ensures that the U.S. Army's Linux systems are secure, reliable, and capable of supporting mission‑critical operations. As a Senior Linux System Administrator, you will lead the day‑to‑day administration, hardening, and modernization of complex enterprise Linux environments and play a key role in delivering ASIC software updates to deployed soldiers.

• Administer, maintain, and harden enterprise Red Hat Enterprise Linux (RHEL) environments across on‑premises and AWS Gov Cloud infrastructure.
• Operate and troubleshoot high‑availability architectures including Red Hat Pacemaker / Corosync clusters and load‑balanced services.
• Lead patch management, system hardening, and STIG/ACAS compliance activities; coordinate vulnerability remediation across production fleets.
• Support ASIC software delivery workflows, including web‑based deployment of software updates to deployed Army units.
• Develop and maintain Infrastructure as Code (IaC) and configuration management using Ansible, Terraform, or equivalent.
• Author and maintain automation scripts (Bash, Python) to streamline operational tasks, monitoring, and reporting.
• Collaborate with security, network, and application teams to support Authority to Operate (ATO) activities and Continuous Authorization processes.
• Serve as a senior technical resource — mentor junior administrators, lead troubleshooting bridges, and contribute to architecture and lifecycle decisions.

• Bachelor's Degree in Computer Science, Computer Engineering, Information Systems, or a related technical discipline preferred. Four additional years of equivalent experience in lieu of degree will also be considered.
• Active Secret security clearance required or higher; ability to obtain and maintain TS/SCI strongly preferred.
• Minimum 5 years of hands‑on Linux system administration experience, with at least 3 of those years in a senior‑level or technical lead capacity.
• Demonstrated experience supporting mission‑critical Linux environments in a DoD or federal setting.
• Experience administering and troubleshooting RHEL in both on‑premise data centers and cloud environments.
• Proven ability to communicate technical strategies, risks, and recommendations clearly to both technical teams and customer stakeholders.
• DoD 8570/8140 compliant baseline certification (Security+ CE or higher) required at time of hire or within 6 months.

• Expert‑level Red Hat Enterprise Linux administration (RHEL 8 required; RHEL 9 strongly preferred).
• Experience operating RHEL workloads in AWS Gov Cloud,…