AWS System Administrator

CACI; United States; On-site; USD 75,000 - 158,000; Full time

Job summary

CACI is seeking an AWS System Administrator to manage enterprise AWS infrastructure and Linux/RHEL environments in a DoD-focused setting. The role emphasizes security, performance, and reliability across multiple domains, with TS/SCI clearance and DoD certification requirements.

The candidate will provision AWS resources, automate tasks, and collaborate with development and security teams to ensure secure, resilient cloud-based systems. A competitive benefits package supports growth and learning.

Qualifications

• Active TS/SCI security clearance (polygraph within 6 months).
• Bachelor’s degree in a technical field (IT/IS/CS).
• DoD 8140.01 / DoD 8570.01-M.IAT Level II certification.
• Hands-on Red Hat Enterprise Linux (RHEL) administration experience.
• Linux shell scripting, user management, networking, and services.

Responsibilities

• Provision, configure, and manage AWS resources (EC2, EBS, VPCs, IAM).
• Administer Linux/RHEL systems, updates, patches, and performance tuning.
• Monitor performance metrics, troubleshoot, and implement corrective actions.
• Enforce security practices, access control, encryption, and vulnerability management.
• Automate tasks with Python/Bash and AWS tools (CLI, CloudFormation).
• Diagnose and resolve issues related to AWS, Linux, and applications.
• Back up and recover AWS resources; stay current with AWS services.

Skills

AWS

Linux system administration

Shell scripting

Security best practices

Education

Bachelor’s Degree in a Technical field (IT / IS / CS)

DoD 8140.01 / DoD 8570.01-M.IAT Level II Certification

Tools

AWS CLI

CloudFormation

Red Hat Enterprise Linux (RHEL)

Job description

Job Title: AWS System Administrator 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:

The TCS team is looking for an AWS System Administrator to work on Enterprise Cross-Domain Systems and associated projects. These systems provide reliable data transfers between domains for general users and programs. In this role, you will be responsible for the day-to-day administration and maintenance of our AWS infrastructure. You will ensure the availability, performance, and security of our cloud-based systems and applications.

Responsibilities:

• Manage AWS resources: Provision, configure, and manage AWS resources such as EC2 instances, EBS volumes, VPCs, security groups, and IAM roles.
• Administer Linux/RHEL systems: Manage and maintain RHEL-based EC2 instances and on-premises Linux servers, including system updates, patch management, and performance tuning.
• Monitor system performance: Monitor system performance metrics, identify and troubleshoot issues, and implement corrective actions.
• Maintain system security: Implement and enforce security best practices, including access control, data encryption, and vulnerability management.
• Automate tasks: Automate routine administrative tasks using scripting languages (e.g., Python, Bash) and AWS tools (e.g., AWS CLI, CloudFormation).
• Troubleshoot and resolve issues: Diagnose and resolve technical issues related to AWS infrastructure, Linux/RHEL operating systems, and applications.
• Implement and maintain backups: Implement and maintain backup and recovery procedures for AWS resources.
• Stay current with AWS technologies: Keep abreast of the latest AWS services, features, and best practices.
• Collaborate with teams: Work closely with development, operations, and security teams to ensure smooth and efficient operations.

Qualifications

Required:

• Active TS/SCI security clearance (must obtain a polygraph within 6 months of start date)
• Bachelor’s Degree in a Technical field (i.e. Information Technology, Information Systems, Computer Science)

• DoD 8140.01 / DoD 8570.01-M.IAT Level II Certification
• Strong hands-on experience with Red Hat Enterprise Linux (RHEL) 7/8/9 administration
• Proficiency in Linux system administration including user management, file systems, networking, and service
• Knowledge of Linux shell scripting and command-line tools

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.

Since this position can be worked in more than one location, the range shown is the national average for the position.

The proposed salary range for this position is:

$75,200-$158,100

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.