Systems Administrator

CACI; Springfield (VA); On-site; USD 75,000 - 158,000; Full time

Job summary

CACI is seeking a Systems Administrator to oversee the administration, operation, and security of our containerized IT infrastructure. You will manage container runtimes, orchestration platforms, storage, and cluster networking, applying patches and upgrades to keep workloads available and secure.

The role requires a TS/SCI clearance, a Bachelor's degree, and at least six years of experience in system administration with Docker/Kubernetes and cloud/on-prem platforms.

Qualifications

• Bachelor's degree in a technical field or related discipline.
• Minimum six years of system administration experience with container tech (Docker/Kubernetes) and cloud/on‑prem platforms.
• Possess Security+ or the ability to obtain within 90 days.
• Active TS/SCI clearance with Polygraph capability.

Responsibilities

• Administer, operate, troubleshoot and secure containerized IT infrastructure.
• Maintain container runtimes, orchestration platforms, storage, networking, and security controls.
• Apply patches/upgrades and document configurations for systems.
• Manage container lifecycle: images, deployments, rollouts, and scaling.
• Produce and maintain architecture diagrams and system requirements.
• Support A&A artifacts, STIGs, CIS benchmarks and enterprise security tools.

Skills

Docker/Kubernetes

AWS (EKS)

Security+

TS/SCI clearance

DoD/IC experience

Education

Bachelor's Degree in CS/IS/Engineering

Tools

Kubernetes

Docker

Helm

XACTA 360

Service+

CPT

SWAP

CI/CD pipelines

Job description

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

The Opportunity:

Responsible for the administration, operation, troubleshooting, and security of IT infrastructure supporting containerized applications. This includes container runtimes, orchestration platforms, cluster networking, persistent storage, and related security controls. Uses systems analysis techniques to diagnose and resolve issues affecting containerized workloads, nodes, storage, and connectivity, ensuring availability, performance, and integrity of the environment. Applies security patches, OS and Kubernetes upgrades, and container image updates. Supports new container-platform infrastructure projects and maintains accurate configuration documentation for assigned systems.

Responsibilities:

• Corrective maintenance: Isolate and restore failed containerized services, nodes, or cluster components.

• Perfective maintenance: Optimize cluster performance, resource allocation, autoscaling, and observability.

• Adaptive maintenance: Update configurations, perform version upgrades, adapt to new security or infrastructure requirements, and support platform changes while preserving workload functionality.

• Manage container lifecycle operations (image management, deployments, rollouts, scaling) and the underlying container-runtime infrastructure.

• Create and maintain as-is documentation, including high-level architecture diagrams of the containerized environment (clusters, namespaces, workloads, services, ingress, storage classes, networking, and integration points) and associated system requirements.

• Support maintenance of active security authorizations (A&A) and Body of Evidence (BoE) artifacts (POAMs, control implementations, test plans). Implement applicable STIGs, CIS Kubernetes Benchmarks, vendor hardening guides for container platforms, and ensure timely patching of nodes, container images, and related components. Integrate with enterprise security services (ESS) and use required tools (XACTA 360, Service+, CPT, SWAP, etc.).

• Support build, test, and deployment of container images, Helm charts manifests, and infrastructure configurations via enterprise, government-managed CI/CD pipelines (where applicable). Focus is on platform operations, image/registry management, and orchestration—not application code develop

Qualifications:

Required:

• Bachelor’s Degree in Computer Science, Information Systems, Engineering, or a related technical/scientific discipline.

• Minimum of six (6) years of system administration experience. Experience with container technologies (Docker/container, Kubernetes) and preferably AWS (EKS or equivalent) or comparable cloud/on-premises container platforms.

• CompTIA Security+ or the ability to obtain within 90 days

• Active/current TS/SCI clearance with the ability to obtain and maintain a Polygraph.

Desired:

• Experience with Helm or similar packaging tools.

• Container security knowledge (image scanning, network policies, runtime protection, CIS benchmarks).

• GitOps experience and CI/CD pipelines for container deployments.

• Prior experience in classified DoD/IC environments supporting A&A processes.

This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI.

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.