Infrastructure/System Administrator Lead

CACI International Inc; Sterling (VA); On-site; USD 121,000 - 266,000; Full time

Job summary

CACI International Inc. is seeking an Infrastructure/System Administrator Lead in Sterling, VA to design and secure cloud/hybrid architectures supporting the software development lifecycle.

You will coordinate design, security, integration and testing across AWS and on‑prem environments. The role requires a TS/SCI clearance, a 10+ year track record in IT administration, deep AWS expertise, and strong Python scripting.

Qualifications

• Active TS/SCI security clearance (polygraph possible)
• Bachelor's degree in information technology or equivalent
• Minimum of 10 years’ IT system administrator experience
• Deep AWS/core services knowledge and hybrid cloud expertise
• Strong Linux administration and Python scripting skills

Responsibilities

• Lead design, secure, and maintain cloud/hybrid environments across AWS and on‑prem data centers
• Bridge between system operations and development teams for a robust infrastructure
• Ensure highly available, scalable environments with CI/CD tooling access
• Perform systems design, development, and integration across the lifecycle
• Install, configure, test, and maintain OS, application software, and management tools
• Conduct systems modeling, simulation, and performance optimization
• Implement robust security, backups, and redundancy strategies
• Prepare and maintain documentation for engineering processes

Skills

Linux admin

Python scripting

Automation scripting

Security clearance

Education

Bachelor's degree in information technology

Tools

AWS (EC2, S3, RDS, Lambda, IAM, SSM)

Terraform

CloudFormation

GitLab CI

GitHub Actions

Kubernetes

Ansible

VMware

Bash/PowerShell

Job description

Job Title: Infrastructure/System Administrator Lead

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

* * *

The Opportunity:

Are you ready to shape the future of intelligence systems? CACI is seeking a talented Infrastructure/System Administrator Lead to join our team in Sterling, VA. In this role, you’ll design cutting‑edge system architectures for new and existing computer systems, coordinating all aspects of development including design, modeling, security, integration, and testing. Your expertise will be crucial in achieving project milestones and developing innovative solutions to complex engineering challenges. Join us at CACI and be part of a team that’s pushing the boundaries of technology in support of our nation’s intelligence capabilities.

Responsibilities:

• Lead the design, secure and maintain implementation across the cloud and hybrid/cloud computing environments that power our software development lifecycle.
• Act as a critical bridge between system operations and development teams, managing a robust infrastructure that spans AWS cloud services and on‑premises data centers.
• Manage a highly available, scalable, and automated environments, ensuring developers have the secure access, CI/CD tools, and computing resources they need to build, test, and deploy code efficiently.
• Perform systems design, development, and integration throughout the entire system life cycle.
• Oversee moderately complex infrastructure, including installing, configuring, testing, and maintaining operating systems, application software, and system management tools.
• Conduct systems modeling, simulation, and analysis to optimize performance and efficiency.
• Implement and maintain robust security measures, including backup and redundancy strategies.
• Prepare and maintain comprehensive documentation for processes and procedures related to engineering projects.

Qualifications:

Required:

• Active TS/SCI security clearance (Willing and able to obtain a polygraph)
• Bachelor’s degree in information technology, a relevant field or equivalent experience
• Minimum of 10 years’ experience as an IT system administrator, or related experience.
• Technical understanding of: Cloud Infrastructure: Deep expertise in AWS core services including EC2, S3, RDS, Lambda, IAM, and Systems Manager (SSM). Hybrid Networking: Proven experience configuring AWS Direct Connect, Site-to-Site VPNs, and hybrid DNS architectures. Infrastructure as Code (IaC): Hands‑on proficiency with Terraform or AWS CloudFormation to provision multi‑environment stacks. CI/CD Platform Support: Experience maintaining and scaling the infrastructure for GitLab CI or GitHub Actions. Operating Systems & Scripting: Advanced administration of Linux (RHEL/Ubuntu) and Windows Server environments, utilizing Bash, Python, or PowerShell for automation.
• Demonstrated proficiency as a Linux system administrator.
• Strong scripting and coding skills, particularly in Python, or similar languages.

Desired:

• Expertise in operational support and system maintenance.
• Containerization & Orchestration: Strong background managing native Kubernetes clusters and AWS EKS (Elastic Kubernetes Service) or native Kubernetes clusters.
• Knowledge in Kubernetes container orchestration and Ansible automation.
• Certifications (Preferred): AWS Certified SysOps Administrator, AWS Certified DevOps Engineer
• Experience with automation and virtualization technologies (e.g., VMware, virtual networking)

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:

$120,800 - $265,800

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.