Senior Infrastructure & Cloud Systems Admin (TS/SCI)

CACI; Sterling (VA); On-site; USD 120,000 - 170,000; Full time

Job summary

CACI is seeking an Infrastructure/System Administrator SME in Sterling, VA, to design and manage cutting-edge architectures for intelligent systems. You will coordinate development, security, integration, and testing across cloud and on‑prem environments, supporting AWS services and hybrid networks.

You will bridge operations and development, ensuring scalable, automated, and secure infrastructure with CI/CD tooling. A TS/SCI clearance is required, with polygraph as a potential next step.

Qualifications

• Active TS/SCI clearance (Willing and able to obtain a polygraph).
• Bachelor's degree in information technology, a relevant field or equivalent experience.
• Minimum of 7 years' experience as an IT system administrator, or related experience.
• Deep expertise in AWS core services including EC2, S3, RDS, Lambda, IAM, and Systems Manager (SSM).
• Experience with Terraform or AWS CloudFormation to provision multi-environment stacks.
• Experience maintaining and scaling infrastructure for GitLab CI or GitHub Actions.
• Advanced administration of Linux (RHEL/Ubuntu) and Windows Server, with automation via Bash, Python, or PowerShell.

Responsibilities

• Support design, security and maintenance across cloud and hybrid environments powering the software development lifecycle.
• Bridge between system operations and development teams across AWS and on-prem data centers.
• Maintain highly available, scalable infrastructures with secure access, CI/CD tooling, and compute resources for code deployment.
• Perform systems design, development, and integration across the system life cycle.
• Install, configure, test, and maintain operating systems and system management tools.
• Conduct modeling, simulation, and analysis to optimize performance and efficiency.
• Maintain robust security measures including backup and redundancy strategies.
• Prepare documentation for processes and procedures related to engineering projects.

Skills

AWS Core Services

Terraform

CloudFormation

CI/CD Tools

Python

Linux Admin

Windows Server

Kubernetes / EKS

Ansible

VMware

Security & Compliance

Education

Bachelor's degree in Information Technology or related field

Tools

Terraform

AWS CloudFormation

Kubernetes

Ansible

VMware

GitLab CI

GitHub Actions

AWS Direct Connect

Job description

CACI is seeking an Infrastructure/System Administrator SME in Sterling, VA, to design and manage cutting-edge architectures for intelligent systems. You will coordinate development, security, integration, and testing across cloud and on‑prem environments, supporting AWS services and hybrid networks.

You will bridge operations and development, ensuring scalable, automated, and secure infrastructure with CI/CD tooling. A TS/SCI clearance is required, with polygraph as a potential next step.