Senior System Admin

CAE•Arlington, TX

8d•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 expert administration of Microsoft Windows and Linux systems, including hardening, deployment, configuration, maintenance, and patch management aligned with DoD cybersecurity requirements. The position supports compliance with DoDI 8510.01 (RMF), NIST 800-53, and applicable DISA STIG requirements. The administrator supports the construction, documentation, and maintenance of mixed Windows and Linux closed-room infrastructures, as well as setup and management of software development environments. The role supports engineers, resolves technical problems, and creates, tests, updates, and executes automated and semi-automated procedures to configure systems in-house and at customer sites. It also supports infrastructure hardware, operating systems, and applications to ensure reliability and availability, and contributes recommendations regarding infrastructure technology lifecycles. The job is performed in an office environment, often in secure closed areas, with use of normal office equipment and occasional access to rack-mounted hardware. Domestic and international travel up to 50% of the year 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.
A BS/BA in engineering, computer science, or information technology; an advanced degree is preferred.
Experience in Linux system administration.
Experience in Windows system administration, including Windows Server system administration.
Experience in VMware administration.
Experience in network administration.
Knowledge of hardware and expertise with command-line tools.
Experience with event, audit, and syslog analysis.
Knowledge of TCP/IP networking and 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 to interact effectively with peers, project vendors, and other teams.
Ability to obtain and maintain a CompTIA Security+ certification.
DoD Secret Clearance required.
Compliance with DoD 8140.03, such as through CISSP, Security+, and an OS certification.
Only U.S. citizens are eligible due to U.S. Government contract requirements.

Nice To Haves

Active DoD security clearance.
Active CompTIA Security+ certification or equivalent.
Advanced degree in engineering, computer science, or information technology.
Strong Windows Server setup and administration skills.
Windows/Linux integration experience, including 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 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, and Security+.

Responsibilities

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