Senior Systems Administrator - RHEL

Science Applications International Corp

Springfield, VA

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JOB DETAILS

SKILLS

Administrative Skills, Amazon Web Services (AWS), Ansible, Automation, Bash Scripting, Chef (Configuration Management), Cloud Computing, Communications Security (COMSEC), Computer Science, Computer Security, Cross-Functional, DNS (Domain Name System), Data Science, Data Visualization, Database Administration, Disaster Recovery, Emerging Technology, Fortune 500 Customers, GIAC - Global Information Assurance Certification, GSEC - GIAC Security Essentials Certification, Hardware Virtualization, High Availability, Human-Computer Interaction, Hybrid Cloud, ITIL (IT Infrastructure Library), Identify Issues, Industry Standards, Information Technology & Information Systems, Internet Security, Linux Administration, Linux Operating System, Load Balancing, Maintain Compliance, Microsoft Hyper-V, Microsoft SQL Server, Microsoft Virtual Server, Microsoft Windows Azure, Microsoft Windows Server, Nagios Monitoring Tool, Network Monitoring, Network Protocols, On Site Support, Operational Support, Performance Tuning/Optimization, Problem Solving Skills, Professional Services, Puppet (Configuration Management), Python Programming/Scripting Language, Red Hat Linux Operating System, Regulatory Compliance, SQL Databases, Sensitive Compartmented Information (SCI), Software Patches, Splunk, System Integration (SI), Systems Administration/Management, Systems Reliability, TCP/IP (Transmission Control Protocol/Internet Protocol), Technical Support, Top Secret Clearance, U.S. National Institute of Standards and Technology (NIST), United States Department of Defense (DoD), VLAN (Virtual Local Area Network), VMWare Certified Professional (VCP), VMWare vSphere, Virtualization, Web Design, Windows PowerShell, Work From Home

LOCATION

Springfield, VA

POSTED

30+ days ago

SAIC - Senior Systems Administrator - RHEL in Springfield, Virginia, United States

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Senior Systems Administrator - RHEL

Job ID: 2611830

Location: Springfield, VA, United States

Date Posted: Apr 23, 2026

Category: Information Technology

Subcategory: Technical Support

Schedule: Full-Time

Shift: Day Job

Travel: Yes - 10% of the time

Minimum Clearance Required: TS.SCI

Clearance Level Must Be Able to Obtain: TS/SCI with Poly

Potential for Remote Work: On-Site

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Job Description

Description

SAIC is seeking a highly motivated and experienced Senior Systems Administrator - RHEL to join our MAJESTIC Joint Program Office (JPO) Team in Springfield, VA. This individual will play an integral role in managing and optimizing mission-critical Red Hat Enterprise Linux (RHEL) systems in a hybrid IT enterprise environment.

The ideal candidate will have in-depth expertise in RHEL system administration, including configuration, maintenance, and performance optimization. Additionally, experience with virtualized environments and enterprise systems, including Windows Server and HCI solutions, is critical. The candidate will ensure system security, reliability, and efficiency while collaborating with cross-functional teams to support operations.

This position requires on-site support in a high-security, fast-paced environment.

Key Responsibilities:

Administer, configure, and maintain Red Hat Enterprise Linux (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 system hardening procedures for RHEL platforms to align with security and compliance requirements, including STIGs and NIST 800-53 guidelines.
Automate regular administrative tasks using Bash, Python, or tools like Ansible.
Monitor and optimize system performance, storage, and network interfaces using tools like Splunk, Nagios, SolarWinds, or Grafana.
Perform disaster recovery (DR) and high availability (HA) operations on Linux-based and hybrid enterprise systems.
Manage centralized logging and monitoring for Linux systems to ensure audit compliance and detect vulnerabilities.
Collaborate with cross-functional teams to ensure smooth integration of RHEL systems with Windows Server, HCI technologies, and other enterprise IT environments.
Document standard operating procedures (SOPs), configuration changes, topology maps, and troubleshooting guides.
Support the evaluation of emerging RHEL and infrastructure technologies and recommend new solutions to enhance infrastructure performance and security.

Qualifications

Education:

Associate's degree

Certifications (CWF Requirements):

Candidates must satisfy Cybersecurity Workforce Framework (CWF) ID 451 (System Administrator - Intermediate Level) requirements, as outlined by Navy COOL.

This requirement can be met by possessing one or more of the following qualifying certifications:

CompTIA Cloud+
CompTIA Security+
GIAC Global Industrial Cyber Security Professional (GICSP)
GIAC Security Essentials Certification (GSEC)
Systems Security Certified Practitioner (SSCP)

OR This requirement can be met through:

A Bachelor's Degree in Cybersecurity, Computer Science, IT, or a related field.

Experience:

1-3 years of professional experience managing and supporting enterprise-level IT environments.

Technical Skills:

Expert in managing Red Hat Enterprise Linux (RHEL) systems, including provisioning, upgrades, system tuning, patching, and performance optimization.
Strong experience in system automation with tools like Ansible, Puppet, or Chef as well as scripting in Bash, Python, or PowerShell.
Familiarity with high availability (HA) concepts, including clustering for Linux environments.
Proficiency in monitoring and diagnostics tools (e.g., 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 industry standards like RMF, NIST 800-53, and DoD cybersecurity guidelines.

Preferred Certifications (In Addition to CWF Requirements):

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

Clearance Requirement:

Active TS/SCI clearance with the ability to obtain and maintain a TS/SCI with Poly.

Work Environment and Notes:

On-Site Work: All work must be conducted on-site in Springfield, VA.
Program Scope: Supports on-premises enterprise IT environments, including virtualized Windows servers, MS SQL Server databases, and networking layers.
Subcontractor Role: Responsibilities and compensation vary based on the subcontract agreement, with a competitive salary aligned to market rates and role-specific requirements.

Overview

SAIC accepts applications on an ongoing basis and there is no deadline.

SAIC is a premier Fortune 500 mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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