Senior Infrastructure/System Administrator Sterling, VA, US

CACI International Inc; Sterling (VA); On-site; USD 87,000 - 182,000; Full time

Job summary

CACI International Inc. in Sterling, VA seeks a Senior Infrastructure/System Administrator to design and maintain cloud and hybrid environments for our software development lifecycle.

You will bridge operations and development, ensuring secure, scalable infrastructure across AWS and on-prem data centers to support code build, test, and deployment. The role requires TS/SCI clearance, 5+ years of IT system administration, and strong skills in Terraform, AWS, Kubernetes, and automation.

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 5 years as an IT system administrator, or related experience.
• Technical understanding of Cloud Infrastructure with AWS core services (EC2, S3, RDS, Lambda, IAM, SSM) and Hybrid Networking (Direct Connect, VPNs)
• Infrastructure as Code with Terraform or AWS CloudFormation
• CI/CD Platform Support with GitLab CI or GitHub Actions
• OS & Scripting with Linux (RHEL/Ubuntu) and Windows Server; Bash, Python, PowerShell
• Demonstrated Linux system administration
• Scripting in Python or similar languages
• Familiarity with Containerization & Orchestration (Kubernetes, AWS EKS, Ansible)
• AWS Certified SysOps Administrator (Preferred)
• Experience with virtualization technologies (VMware)

Responsibilities

• Support design, security and maintenance across cloud and hybrid environments
• Bridge between system operations and development teams across AWS and on-prem data centers
• Manage highly available, scalable, automated environments for CI/CD and development
• Perform systems design, development, and integration across the system life cycle
• Implement complex infrastructure with installation, configuration, testing and maintenance
• Conduct modeling, simulation and analysis to optimize performance
• Maintain robust security measures including backups and redundancy
• Prepare documentation for processes and procedures

Skills

Cloud infrastructure

Linux administration

Scripting (Python)

Automation

Education

Bachelor’s degree in information technology or related field

Tools

Terraform

AWS CloudFormation

GitLab CI/GitHub Actions

Kubernetes

Ansible

VMware

Job description

## Senior Infrastructure/System AdministratorSterling, VA, USApply NowFind out how well you match with this jobJob ID: 334146Job Title: Senior Infrastructure/System AdministratorJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCIEmployee Type: RegularPercentage 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 Senior Infrastructure/System Administrator 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:*** Support the design, security and maintenance 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.* 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 robust security measures, including backup and redundancy strategies.* Prepare and 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 5 years 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.* Scripting and coding skills, particularly in Python, or similar languages.*Desired:** Expertise in operational support and system maintenance.* Familiarity with Containerization & Orchestration, managing native Kubernetes clusters and AWS EKS (Elastic Kubernetes Service) or native Kubernetes clusters with Ansible automation.* Certifications (Preferred): AWS Certified SysOps Administrator* 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:$86,600 - $181,800*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.*