Systems Administrator Lead Aberdeen Proving Ground, MD, US

CACI International Inc.; Aberdeen, Northern (MD, KY); Hybrid; USD 116,000 - 254,000; Full time

Job summary

CACI International Inc. seeks a Systems Administrator Lead to bolster enterprise IT infrastructure across multiple security enclaves. You will administer Windows and Linux servers, manage AD/GPO, enforce STIGs, and drive RMF/NIST-800-53 compliance while mentoring junior staff.

Expected to lead deployments, manage security tooling, and coordinate with government customers and cybersecurity teams. This role includes up to 10% local travel and a challenging, mission-driven environment.

Qualifications

• Active Secret security clearance is required.
• 10+ years of professional systems administration experience.
• Strong Windows Server and Linux server administration experience.
• Experience with Active Directory, Group Policy, and enterprise identity management.
• Experience with firewalls, intrusion detection, and anti-virus solutions.
• Knowledge of virtualization and cloud platforms (VMware, Hyper-V, AWS, Azure).
• Understanding of TCP/IP, DNS, DHCP, routing and switching.
• Experience implementing STIGs and security compliance for DoD systems.
• Excellent problem solving and communication skills.
• Ability to lead technical teams and mentor junior staff.

Responsibilities

• Lead design, implementation, and management of enterprise IT infrastructure.
• Administer Windows and Linux server environments across security enclaves.
• Manage AD, GPO, DNS, DHCP, and enterprise identity systems.
• Enforce STIGs and secure baselines; ensure compliance per DoD RMF/NIST 800-53.
• Troubleshoot incidents; perform root cause analysis and remediation.
• Document systems, procedures, diagrams and CMDB data.
• Plan patching, vulnerability remediation and system hardening.
• Oversee backup and disaster recovery operations.
• Coordinate with cybersecurity teams on security controls and events.
• Lead infrastructure projects and staff training; automate tasks with scripts.

Education

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

Tools

VMware

Hyper-V

AWS

Azure

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:

• 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.)

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range:

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$115,600 - 254,200 USD

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.