Senior Infrastructure/System Administrator

CACI International • Sterling, VA

7d • $86,600 - $181,800

About The Position

CACI is seeking a Senior Infrastructure/System Administrator to join its team in Sterling, Virginia. The role designs system architectures for new and existing computer systems and coordinates development activities across design, modeling, security, integration, and testing. The position supports cloud and hybrid environments that power the software development lifecycle, bridging system operations and development teams across AWS services and on-premises data centers. It manages secure, highly available, scalable, and automated infrastructure and contributes to engineering projects throughout the system life cycle.

Requirements

• Active TS/SCI security clearance and willingness and ability to obtain a polygraph.
• Bachelor’s degree in information technology or a relevant field, or equivalent experience.
• At least 5 years of experience as an IT system administrator or in a related role.
• 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 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 environments.
• Experience using Bash, Python, or PowerShell for automation.
• Demonstrated proficiency as a Linux system administrator.
• 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 managing 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 supporting the software development lifecycle.
• Bridge system operations and development teams while managing infrastructure across AWS cloud services and on-premises data centers.
• Manage highly available, scalable, and automated environments, providing developers with secure 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 comprehensive documentation for engineering project processes and procedures.

Benefits

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

What This Job Offers

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