Senior Systems Administrator - RHEL

SAIC•Newington, VA

2d•Onsite

About The Position

SAIC is seeking a highly motivated and experienced Senior Systems Administrator to join its MAJESTIC Joint Program Office (JPO) Team in Springfield, Virginia. The role manages and optimizes mission-critical Red Hat Enterprise Linux (RHEL) systems in a hybrid IT enterprise environment, with a focus on system security, reliability, and efficiency. It also supports virtualized and enterprise systems, including Windows Server and hyperconverged infrastructure (HCI) solutions, in collaboration with cross-functional teams. This position provides on-site support in a high-security, fast-paced environment. The program supports on-premises enterprise IT environments, including virtualized Windows servers, Microsoft SQL Server databases, and networking layers. The role is identified as a subcontractor position; responsibilities and compensation vary by subcontract agreement, with competitive salary aligned to market rates and role-specific requirements.

Requirements

High school diploma or GED.
Meet Cybersecurity Workforce Framework ID 451 (System Administrator – Intermediate Level) requirements through one or more qualifying certifications: CompTIA Cloud+, CompTIA Security+, GIAC GICSP, GIAC GSEC, or SSCP; alternatively, a bachelor’s degree in Cybersecurity, Computer Science, IT, or a related field satisfies this requirement.
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 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 diagnostic 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 standards such as RMF, NIST 800-53, and DoD cybersecurity guidelines.
Active TS/SCI clearance and ability to obtain and maintain 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 (strongly preferred).
Nutanix Certified Professional (NCP) certification or VMware Certified Professional (VCP).
Familiarity with cloud platforms such as Microsoft Azure or AWS and hybrid cloud/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 aligned 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 improve infrastructure performance and security.