Systems Administrator Lead

CACI International•Aberdeen Proving Ground, MD

10d•$115,600 - $254,200•Onsite

About The Position

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. You will lead the installation, configuration, and maintenance of hardware, software, and systems upgrades across multiple security domains. You will manage network accounts, network security, and web services for mission-critical systems. You will implement and maintain network security tools including firewalls, anti-virus, and intrusion detection services. You will monitor system configuration and performance to ensure optimal operation and availability. You will provide technical leadership and mentorship to junior systems administrators and interface with government customers, cybersecurity teams, and cross-functional technical staff.

Requirements

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

Nice To Haves

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.)

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