Senior Systems Administrator - RHEL

SAIC•Springfield, VA

1d•Onsite

About The Position

SAIC is seeking a highly motivated and experienced Senior Systems Administrator - RHEL to join the MAJESTIC Joint Program Office (JPO) Team in Springfield, Virginia. The position manages and optimizes mission-critical Red Hat Enterprise Linux (RHEL) systems in a hybrid IT enterprise environment. The administrator helps ensure system security, reliability, and efficiency while collaborating with cross-functional teams. The role requires on-site support in a high-security, fast-paced environment and supports on-premises enterprise IT, including virtualized Windows servers, MS SQL Server databases, and networking layers. The role is described as a subcontractor position; responsibilities and compensation vary based on the subcontract agreement, with a competitive salary aligned to market rates and role-specific requirements.

Requirements

High school diploma or GED.
Meet Cybersecurity Workforce Framework (CWF) ID 451 System Administrator – Intermediate Level requirements through one or more listed certifications: CompTIA Cloud+, CompTIA Security+, GIAC GICSP, GIAC GSEC, or SSCP; alternatively, meet the requirement through a bachelor's degree in Cybersecurity, Computer Science, IT, or a related field.
1–3 years of professional experience managing and supporting enterprise-level IT environments.
Expertise managing RHEL systems, including provisioning, upgrades, system tuning, patching, and performance optimization.
Strong experience with system automation tools such as Ansible, Puppet, or Chef, and scripting in Bash, Python, or PowerShell.
Familiarity with high-availability concepts, including clustering for Linux environments.
Proficiency with monitoring and diagnostics tools such as Splunk, SolarWinds, Grafana, or Nagios.
Strong understanding of virtualization platforms, including VMware vSphere, Nutanix AHV, or Hyper-V.
Knowledge of networking technologies and protocols, including TCP/IP, DNS, VLANs, and load balancing configurations for Linux systems.
Experience supporting compliance with RMF, NIST 800-53, and DoD cybersecurity guidelines.
Active TS/SCI clearance and ability to obtain and maintain a TS/SCI with Poly.
Must be a U.S. citizen.
Must work on-site in Springfield, Virginia.

Nice To Haves

Red Hat Certified Engineer (RHCE) certification is strongly preferred.
Nutanix Certified Professional (NCP) or VMware Certified Professional (VCP) certification.
Familiarity with Microsoft Azure or AWS and hybrid cloud or hybrid IT implementations.
Knowledge of storage technologies and backup solutions.
ITIL v4 certification for service management processes.

Responsibilities

Administer, configure, and maintain RHEL systems, including patching, upgrades, tuning, and troubleshooting.
Perform advanced system administration for virtualized environments such as VMware vSphere or Nutanix AHV.
Implement and enforce RHEL system hardening procedures to align with security and compliance requirements, including STIGs and NIST 800-53 guidelines.
Automate regular administrative tasks using Bash, Python, or tools such as Ansible.
Monitor and optimize system performance, storage, and network interfaces using tools such as Splunk, Nagios, SolarWinds, or Grafana.
Perform disaster recovery and high-availability operations on Linux-based and hybrid enterprise systems.
Manage centralized logging and monitoring for Linux systems to support audit compliance and vulnerability detection.
Collaborate with cross-functional teams to integrate RHEL systems with Windows Server, HCI technologies, and other enterprise IT environments.
Document standard operating procedures, configuration changes, topology maps, and troubleshooting guides.
Support evaluation of emerging RHEL and infrastructure technologies and recommend solutions to enhance infrastructure performance and security.