Senior Systems Administrator

CACI; Laurel (MD); On-site; USD 121,000 - 266,000; Full time

Job summary

CA CI? CACI in Laurel, MD is seeking a Senior Systems Administrator to support mission-critical Linux environments across OpenStack, AWS, and VMware, focusing on VM management and DevOps. You will work with Ansible, Rancher, and kubectl to ensure cluster health.

The role requires TS/SCI with Polygraph, Security+, and 15 years of experience in large-scale sysadmin duties; Bachelor's or equivalent experience, with emphasis on security and enterprise-grade operations.

Qualifications

• Active NSA TS/SCI with Polygraph.
• Strong Linux administration and troubleshooting skills.
• Experience or exposure to Ansible.
• Hands‑on experience managing and securing VMs (STE/STN).
• Active Security+ Certification (required for all Infrastructure Team members).
• 15 years of Sys Admin experience supporting programs of similar scope and complexity.
• Bachelor’s degree in a technical discipline OR an additional 5 years of Sys Admin experience may be substituted for the degree.

Responsibilities

• Execute core Sys Admin tasks, including server certificate lifecycle management, VM health monitoring, software updates (manual and YUM-repo based), and ensuring all systems meet enterprise security standards.
• Monitor and manage production Linux VMs—both standalone and those integrated into Kubernetes clusters—across multiple hosting platforms.
• Partner closely with customers and development teams to meet product needs ranging from simple VM changes to complex cluster builds.
• Perform DevOps‑oriented tasks such as running and maintaining Ansible playbooks, pushing configuration updates, and monitoring Kubernetes clusters using Rancher or kubectl to ensure node and pod health.

Skills

Linux administration

Troubleshooting

Education

Bachelor’s degree in a technical discipline

5 years experience substitution for degree

Tools

Ansible

Rancher

kubectl

Kubernetes

VMware

OpenStack

AWS

PKI

CentOS

RHEL

Job description

Job Title: Senior Systems AdministratorJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: NoneType of Travel: None* * *

The Opportunity

Join a high-impact Infrastructure Team where you’ll support mission-critical environments across OpenStack, AWS, and VMware—focusing exclusively on Linux virtual machines. In this role, you’ll work both collaboratively and independently, contributing to customer success while expanding your expertise in VM management, DevOps, automation, and cloud hosting technologies.

You’ll gain deep exposure to our product ecosystem, broaden your Linux administration capabilities, and have room to explore specialized areas like Kubernetes, automation, and certificate management. Ideal applicants bring strong Linux fundamentals, solid Sys Admin experience, and a continuous‑learning mindset.

Responsibilities

• Execute core Sys Admin tasks, including server certificate lifecycle management, VM health monitoring, software updates (manual and YUM-repo based), and ensuring all systems meet enterprise security standards.

• Monitor and manage production Linux VMs—both standalone and those integrated into Kubernetes clusters—across multiple hosting platforms.

• Partner closely with customers and development teams to meet product needs ranging from simple VM changes to complex cluster builds.

• Perform DevOps‑oriented tasks such as running and maintaining Ansible playbooks, pushing configuration updates, and monitoring Kubernetes clusters using Rancher or kubectl to ensure node and pod health.

Qualifications

• An active NSA TS/SCI with Polygraph

• Strong Linux administration and troubleshooting skills

• Experience or exposure to Ansible

• Hands‑on experience managing and securing VMs (STE/STN)

• Active Security+ Certification (required for all Infrastructure Team members)

• 15 years of Sys Admin experience supporting programs of similar scope and complexity

• Bachelor’s degree in a technical discipline OR an additional 5 years of Sys Admin experience may be substituted for the degree

Desired

• Experience with CentOS or RHEL

• PKI or server certificate setup

• Kubernetes administration experience

• AWS familiarity (e.g., EC2, RDS)

• OpenStack exposure

• VMware exposure

• Ability to succeed both independently and as a collaborative team member

• Git experience (push, pull, commit workflows)

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:

$120,800 - $265,800

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.