Systems Administrator Lead

CACI; Maryland; On-site; USD 110,000 - 160,000; Full time

Job summary

CACI is seeking a Systems Administrator Lead to guide the DoD IT infrastructure that supports intelligence and mission systems. You will lead Windows and Linux server environments, manage AD and security controls, and mentor junior staff across security enclaves.

Responsibilities include patching, vulnerability remediation, and coordinating with cybersecurity teams to maintain compliant, secure operations.

Qualifications

• Active Secret clearance required.
• 10+ years of professional experience in systems administration.
• Experience with Windows Server and Linux environments.
• Experience with AD, GPO, and enterprise identity management.
• Experience with network security tools including firewalls and IDS.
• Knowledge of virtualization (VMware, Hyper‑V) and cloud platforms (AWS, Azure).
• Understanding of networking concepts (TCP/IP, DNS, DHCP).
• Experience implementing STIGs and DoD security compliance.

Responsibilities

• Lead design, implementation, and management of enterprise IT infrastructure.
• Administer Windows and Linux servers across multiple security enclaves.
• Manage AD, Group Policy, DNS, DHCP, and identity systems.
• Enforce STIGs and secure baselines; ensure DoD compliance.
• Perform troubleshooting, root cause analysis, and incident response.
• Develop system docs: SOPs, diagrams, CMDB.
• Plan patching, vulnerability remediation, and hardening activities.
• Coordinate with cybersecurity staff to implement controls and respond to incidents.

Skills

Active Secret clearance

Windows Server

Linux server environments

Active Directory

Group Policy

Enterprise identity management

Firewalls

Intrusion detection

VMware

Hyper-V

AWS

Azure

Networking concepts (TCP/IP, DNS, DHCP

STIGs and DoD security compliance

Troubleshooting

PowerShell

Bash

Python

Education

Master's degree in Electrical Engineering, Electronic Engineering, Computer Engineering, Computer Science, or Information Systems

Tools

SCCM

Satellite

Ansible

Terraform

Puppet

Splunk

ACAS/Nessus

eMASS

Job description

Job Title: Systems Administrator Lead

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: Secret

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

* * *

The Opportunity:

Lead systems administration efforts for complex Department of Defense IT infrastructure supporting intelligence and mission systems. As a Systems Administrator Lead, you will:

• Administer and support daily operational requirements of computer network systems including workstations, file servers, web servers, and cloud-based infrastructure
• Lead the installation, configuration, and maintenance of hardware, software, and systems upgrades across multiple security domains
• Manage network accounts, network security, and web services for mission‑critical systems
• Implement and maintain network security tools including firewalls, anti-virus, and intrusion detection services
• Monitor system configuration and performance to ensure optimal operation and availability
• Provide technical leadership and mentorship to junior systems administrators
• Interface with government customers, cybersecurity teams, and cross‑functional technical staff

Responsibilities:

• Lead the design, implementation, and management of enterprise‑level IT infrastructure solutions
• Administer Windows and Linux server environments across multiple security enclaves
• Manage Active Directory, Group Policy, DNS, DHCP, and enterprise identity management systems
• Implement and enforce Security Technical Implementation Guides (STIGs) and secure configuration baselines
• Maintain system security compliance with NIST 800-53, Risk Management Framework (RMF), and DoD security requirements
• Perform system troubleshooting, root cause analysis, and incident response activities
• Develop and maintain system documentation including standard operating procedures, network diagrams, and configuration management databases
• Plan and execute system patching, vulnerability remediation, and system hardening activities
• Manage backup and recovery operations to ensure data integrity and business continuity
• Coordinate with cybersecurity personnel to implement security controls and respond to security events
• Lead infrastructure projects including system migrations, upgrades, and technology refresh initiatives
• Train staff on software applications, systems access, and security best practices
• Automate routine administrative tasks using PowerShell, Bash, Python, or other scripting languages
• Support virtualization platforms such as VMware, Hyper-V, or cloud infrastructure (AWS, Azure)
• Maintain system monitoring and alerting tools to proactively identify and resolve issues

Qualifications:

Required:

• Active Secret security clearance (required)
• Master's degree in Electrical Engineering, Electronic Engineering, Computer Engineering, Computer Science, or Information Systems
• 10+ years of professional experience in systems administration
• Strong experience administering Windows Server and/or Linux server environments
• Demonstrated experience with Active Directory, Group Policy, and enterprise identity management
• Experience with network security tools including firewalls, intrusion detection systems, and anti‑virus solutions
• Knowledge of virtualization technologies (VMware, Hyper‑V) and/or cloud platforms (AWS, Azure)
• Understanding of networking concepts including TCP/IP, DNS, DHCP, routing, and switching
• Experience implementing STIGs and security compliance requirements for DoD systems
• Strong troubleshooting and problem‑solving skills with ability to resolve complex technical issues
• Excellent communication skills with ability to explain technical concepts to non‑technical stakeholders
• Demonstrated ability to lead technical teams and mentor junior staff
• Compliance with Cyber WorkForce (CWF) directives, including any required certifications

Desired:

• Industry certifications such as CompTIA Security+, Network+, Server+, Linux+, MCSA, MCSE, or RHCE
• Experience with DoD Risk Management Framework (RMF) and Authorization to Operate (ATO) processes
• Knowledge of DISA Enterprise Mission Assurance Support Service (eMASS) and Assured Compliance Assessment Solution (ACAS/Nessus)
• Experience with containerization technologies (Docker, Kubernetes)
• Familiarity with Infrastructure as Code (IaC) tools such as Ansible, Terraform, or Puppet
• Experience with scripting and automation using PowerShell, Python, Bash, or similar languages
• Understanding of DevSecOps principles and CI/CD pipelines
• Experience supporting intelligence community systems or special access programs
• Knowledge of Cross Domain Solutions (CDS) and multi-level security architectures
• Experience with enterprise backup solutions (Veeam, Commvault, etc.)
• Familiarity with SIEM tools and log aggregation platforms (Splunk, ELK)
• Previous experience supporting government program offices or defense contractors
• Experience with configuration management tools (SCCM, Satellite, etc.