Systems Administrator - Secret Clearance required

GD Information Technology • Arlington, TX

2d • Onsite

About The Position

Transform technology into opportunity as a EMS System Administrator with GDIT. In this role, you will support mission‑critical enterprise IT systems and contribute to the modernization of agency operations. At GDIT, our people make the difference. As an EMS System Administrator, you will help ensure today’s operations remain secure while enabling a smarter tomorrow. We are seeking a proactive, mid-level Enterprise Management Systems (EMS) Administrator to manage, automate, and optimize our critical infrastructure tools. Unlike traditional maintenance roles, this position requires strong critical thinking, the ability to operate autonomously, and a heavy focus on automating routine tasks using Python and Ansible. You will be instrumental in modernizing our toolsets, reverse-engineering undocumented architectures, and ensuring the high availability of mission-critical identity and access management platforms. The EMS System Administrator plays a critical role in transforming technology into opportunity by supporting and modernizing mission‑essential enterprise IT systems. This mid‑level technical position is responsible for managing, optimizing, and automating key infrastructure platforms with a strong emphasis on Identity and Access Management (IAM). The role requires deep problem‑solving skills, the ability to operate autonomously, and expertise in Python, Ansible, and modern CI/CD automation practices. As an EMS System Administrator, you will ensure the high availability, secure configuration, and reliable performance of core security systems including Cisco ISE, Aruba ClearPass, RSA SecurID, and LDAP services. You will also support incident response for critical outages, manage secondary infrastructure tools, and lead efforts to reverse‑engineer and document complex, undocumented enterprise environments. Through proactive modernization and automation, you will strengthen operational resilience and contribute directly to the evolution of a smarter, more efficient IT future.

Requirements

• Bachelor’s Degree. An additional 4 years of experience may be substituted in lieu of degree.
• Minimum of an active Secret security clearance.
• DoD 8570/8140 IAT Level II compliance (e.g., CompTIA Security+ CE).
• 5+ years of progressive experience in IT infrastructure or systems administration, including at least 2-3 years of direct experience managing Linux environments, IAM/NAC tools, and enterprise automation.
• Demonstrated proficiency in scripting (Python, Bash) and configuration management (Ansible).
• Direct experience managing high-availability identity, access, or network access control tools (ISE, ClearPass, RSA, LDAP).
• Exceptional critical thinking skills with a proven ability to work independently in environments with limited existing documentation or mentorship.
• US Citizenship Required

Nice To Haves

• Experience operating within Department of War (DoW) STIG compliance and IL5 framework guidelines.
• Direct experience with InfoBlox and GitLab administration.
• Prior experience reverse-engineering undocumented infrastructure deployments.

Responsibilities

• Manage, automate, and optimize critical infrastructure tools.
• Modernize toolsets.
• Reverse-engineer undocumented architectures.
• Ensure the high availability of mission-critical identity and access management platforms.
• Manage, optimize, and automate key infrastructure platforms with a strong emphasis on Identity and Access Management (IAM).
• Ensure the high availability, secure configuration, and reliable performance of core security systems including Cisco ISE, Aruba ClearPass, RSA SecurID, and LDAP services.
• Support incident response for critical outages.
• Manage secondary infrastructure tools.
• Lead efforts to reverse‑engineer and document complex, undocumented enterprise environments.

Benefits

• Comprehensive benefits and wellness packages
• 401K with company match
• Competitive pay
• Paid time off
• Variety of medical plan options, some with Health Savings Accounts
• Dental plan options
• Vision plan
• 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match.
• Full flex work weeks where possible
• Variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave.
• Short and long-term disability benefits
• Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.

What This Job Offers

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