Senior System Admin

CAE • Arlington, TX

6d • Onsite

About The Position

CAE is seeking a mission-focused Senior System Administrator to support IT operations, advanced technical support, and cybersecurity readiness in a defense contracting environment. The role requires administration of Microsoft Windows and Linux systems, including hardening, deployment, configuration, maintenance, and patch management aligned with DoD cybersecurity requirements and compliance frameworks such as DoDI 8510.01 (RMF), NIST 800-53, and applicable DISA STIG requirements.

The position supports the development, documentation, and maintenance of mixed Windows and Linux closed-room infrastructures and the setup and management of software development environments. The administrator supports engineers, troubleshoots problems, and creates, tests, updates, and executes automated and semi-automated procedures for configuring system components in-house and at customer sites. The role also supports infrastructure reliability and availability, provides recommendations on infrastructure technology lifecycles, and answers technical questions.

The role is performed in an office environment, often in secure closed areas, with occasional access to rack-mounted hardware. Domestic and international travel of up to 50% may be required. A DoD Secret Clearance is required, and only U.S. citizens are eligible due to U.S. Government contract requirements.

Requirements

• Minimum of 5 years of related experience.
• Bachelor’s degree in engineering, computer science, or information technology; a master’s degree or above is preferred.
• Experience with Linux system administration, Windows system administration, Windows Server system administration, VMware administration, and network administration.
• Knowledge of computer hardware and expertise with command-line tools.
• Experience analyzing events, audits, and syslogs.
• Knowledge of TCP/IP networking.
• Experience setting up managed switches and routers.
• Experience with scripting languages such as Bash, CSH, Python, and PowerShell.
• Advanced problem-solving skills.
• Attention to detail and strong communication skills for interacting effectively with peers, project vendors, and other teams.
• Ability to obtain and maintain a CompTIA Security+ certification.
• DoD Secret Clearance is required.
• U.S. citizenship is required due to U.S. Government contract requirements.
• Must comply with DoD 8140.03 requirements, with examples including CISSP, Security+, and an operating-system certification.
• Ability to work in a standard office environment.

Nice To Haves

• An advanced degree in engineering, computer science, or information technology.
• An active DoD security clearance.
• An active CompTIA Security+ certification or equivalent.
• Strong Windows Server setup and administration skills.
• Experience integrating Windows and Linux systems for file sharing and authentication.
• Experience setting up domain controllers and creating, managing, updating, and deploying Group Policy Objects.
• Experience configuring, managing, and monitoring storage systems such as NAS, SAN, and NFS.
• Experience configuring Cisco routers and switches.
• Experience configuring HP/Aruba routers and switches.
• Experience configuring Juniper switches.
• Experience with custom automated operating-system deployment, such as Windows Deployment Toolkit.
• Experience with configuration management; GitHub experience is desired.
• Experience setting up and managing centralized auditing.
• Experience setting up and managing centralized patching, such as WSUS.
• Experience with system hardening and implementation of Security Technical Implementation Guides (STIGs).
• Experience with vulnerability scanners such as ACAS/Nessus and SCAP.
• Experience with version-control tools such as ClearCase, Git, and Bitbucket.
• Experience supporting DoD or classified systems.
• Familiarity with SIEM tools such as Splunk and SolarWinds SEM.
• Relevant certifications such as RHCSA, Windows Server Hybrid Administrator Associate, CISSP, or Security+.

Responsibilities

• Administer Linux systems.
• Administer Windows systems and Windows Server environments.
• Administer VMware environments.
• Administer networks.
• Set up and maintain infrastructure.
• Develop automated system deployment capabilities.
• Build, document, and maintain mixed Windows and Linux closed-room infrastructures.
• Set up and manage software development environments.
• Support engineers and continuously troubleshoot and solve problems.
• Create, test, update, and execute automated and semi-automated procedures for configuring system components in-house and at customer sites.
• Support and monitor infrastructure hardware, operating systems, and infrastructure applications to ensure reliability and availability of infrastructure services.
• Contribute recommendations regarding the lifecycle of infrastructure technologies.
• Answer technical questions.
• Comply with company security and data-protection policies and procedures.
• Properly mark and handle information and materials, restrict access to personnel with a need to know, and store government and proprietary information electronically on company-provided resources.

Benefits

• Comprehensive and competitive benefits package.
• Flexibility that promotes work-life balance.
• An environment where employees are valued, respected, and safe.
• Freedom to take initiative and make decisions.
• Recognition, professional development, advancement, and opportunities to have fun.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior