Infrastructure/System Administrator SME

CACI • Sterling, VA

8d

About The Position

CACI is seeking an Infrastructure/System Administrator SME in Sterling, Virginia, to design system architectures for new and existing computer systems and coordinate development activities across design, modeling, security, integration, and testing. The role supports intelligence missions by developing solutions to complex engineering challenges and helping achieve project milestones.

The position supports the design, security, and maintenance of cloud and hybrid-cloud environments for the software development lifecycle. The administrator connects operations and development teams and manages infrastructure spanning AWS services and on-premises data centers. The role helps maintain highly available, scalable, automated environments that provide developers with secure access, CI/CD tools, and computing resources to build, test, and deploy code.

The position performs systems design, development, and integration throughout the system life cycle; implements and maintains infrastructure, operating systems, application software, and management tools; conducts modeling and analysis; maintains security, backup, and redundancy measures; and documents engineering processes and procedures. An active TS/SCI clearance is required, and the candidate must be willing and able to obtain a polygraph. The role allows up to 10% local travel.

Requirements

• Active TS/SCI security clearance; must be willing and able to obtain a polygraph.
• Bachelor’s degree in information technology or a relevant field, or equivalent experience.
• At least 7 years of experience as an IT system administrator or in related work.
• Deep expertise in AWS core services, including EC2, S3, RDS, Lambda, IAM, and Systems Manager (SSM).
• Experience configuring AWS Direct Connect, Site-to-Site VPNs, and hybrid DNS architectures.
• Hands-on proficiency with Terraform or AWS CloudFormation for provisioning multi-environment stacks.
• Experience maintaining and scaling infrastructure for GitLab CI or GitHub Actions.
• Advanced administration of Linux (RHEL/Ubuntu) and Windows Server environments.
• Experience using Bash, Python, or PowerShell for automation.
• Demonstrated proficiency as a Linux system administrator.
• Strong scripting and coding skills, particularly in Python or similar languages.

Nice To Haves

• Expertise in operational support and system maintenance.
• Familiarity with containerization and orchestration, including native Kubernetes clusters and AWS EKS, or native Kubernetes clusters with Ansible automation.
• AWS Certified SysOps Administrator certification.
• Experience with automation and virtualization technologies, such as VMware and virtual networking.

Responsibilities

• Support the design, security, and maintenance of cloud and hybrid-cloud computing environments used in the software development lifecycle.
• Bridge system operations and development teams while managing infrastructure across AWS cloud services and on-premises data centers.
• Maintain highly available, scalable, and automated environments, including secure developer access, CI/CD tools, and computing resources.
• Perform systems design, development, and integration throughout the system life cycle.
• Implement 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.
• Maintain security measures, including backup and redundancy strategies.
• Prepare documentation for engineering project processes and procedures.

Benefits

• Flexible time off benefit.
• Learning resources and learning and development opportunities.
• Competitive compensation and benefits, including healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior