Infrastructure/Systems Administration

CACI International Inc; Danbury (CT); On-site; USD 104,000 - 218,000; Full time

Job summary

CACI International Inc is seeking an Infrastructure/Systems Administrator to support a zero-trust IT environment, administering Linux, Windows, and macOS across servers and workstations. You will collaborate with engineering and IT teams to deliver reliable solutions and improve security and compliance across programs.

The role emphasizes hands-on patching, cloud and virtualization support (AWS, Azure, VMware, Nutanix), security hardening, and documentation, with up to 10% travel and strong

Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field, or equivalent experience.
• 5–7 years of hands-on Systems Administration experience supporting Linux and Windows environments.
• Working knowledge of patch management, PAM, scripting, cloud/virtualization, and security hardening.

Responsibilities

• Administer multi-OS environments including Red Hat, Ubuntu, Windows, and macOS across servers and workstations.
• Troubleshoot infrastructure issues involving servers, storage, networking, and security in remote and on-site environments.
• Perform patching, package management, and compliance activities using tools such as Red Hat Satellite, Landscape, Foreman, MECM, or similar technologies.
• Manage identity and access services, including authentication and privileged access management using Centrify or comparable PAM solutions.
• Support AWS, Azure, VMware, Nutanix, or similar cloud and virtualization platforms.
• Collaborate with engineering, security, and support teams to resolve complex cross‑platform infrastructure issues.
• Support a zero‑trust security posture through system hardening, encryption, device controls, and security best practices.
• Support NIST compliance and security requirements within the IT environment.
• Utilize Splunk and related monitoring/logging technologies for system visibility, troubleshooting, and operational support.
• Develop, maintain, and improve technical documentation, procedures, and operational standards.
• Identify opportunities to improve infrastructure processes, tooling, automation, and service delivery.
• Evaluate IT requirements for internal, remote, and external customers and develop effective technical solutions.
• Independently manage assigned services and technologies while maintaining accountability for operational performance.
• Propose new ideas, challenge existing processes when appropriate, and contribute to continuous improvement initiatives.

Skills

Linux administration

Windows administration

macOS administration

Identity and access management

Security hardening

Troubleshooting

Documentation

Education

Bachelor's degree or equivalent experience

Tools

Red Hat Satellite

MECM

Landscape

Centrify

VMware

Nutanix

Splunk

Job description

Job Title: Infrastructure/Systems Administration

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

The Opportunity

CACI is seeking an Infrastructure/Systems Administrator to support a zero-trust research and development IT environment.

The role supports a secure, compliant infrastructure integrating on-premises and cloud-based technologies across CACI programs.

Provides hands‑on administration and technical support across Linux, Windows, and macOS servers and workstations.

Works collaboratively with Systems Administrators, engineers, and corporate IT teams to troubleshoot complex infrastructure issues and deliver reliable technical solutions.

Contributes to continuous improvement, security hardening, compliance, documentation, and operational excellence.

Responsibilities

• Administer multi-OS environments including Red Hat, Ubuntu, Windows, and macOS across servers and workstations.


• Troubleshoot infrastructure issues involving servers, storage, networking, and security in remote and on-site environments.


• Perform patching, package management, and compliance activities using tools such as Red Hat Satellite, Landscape, Foreman, MECM, or similar technologies.


• Manage identity and access services, including authentication and privileged access management using Centrify or comparable PAM solutions.


• Support AWS, Azure, VMware, Nutanix, or similar cloud and virtualization platforms.


• Collaborate with engineering, security, and support teams to resolve complex cross‑platform infrastructure issues.


• Support a zero‑trust security posture through system hardening, encryption, device controls, and security best practices.


• Support NIST compliance and security requirements within the IT environment.


• Utilize Splunk and related monitoring/logging technologies for system visibility, troubleshooting, and operational support.


• Develop, maintain, and improve technical documentation, procedures, and operational standards.


• Identify opportunities to improve infrastructure processes, tooling, automation, and service delivery.


• Evaluate IT requirements for internal, remote, and external customers and develop effective technical solutions.


• Independently manage assigned services and technologies while maintaining accountability for operational performance.


• Propose new ideas, challenge existing processes when appropriate, and contribute to continuous improvement initiatives.

Qualifications

Required

• Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent experience.


• 5–7 years of hands‑on Systems Administration experience supporting Linux and Windows environments.


• Working knowledge of at least 3–4 of the following areas:




• Patch/package management using Satellite, Landscape, MECM, Tanium, or similar tools.


• Identity and privileged access management using Centrify or similar PAM technologies.


• Scripting and automation using Bash, Python, PowerShell, or similar languages.


• Cloud platforms including AWS or Azure, or virtualization technologies such as VMware or Nutanix.


• Security hardening, encryption, endpoint security, or device‑control technologies.




• Strong analytical, troubleshooting, and problem‑solving skills.


• Ability to work independently with minimal supervision and take ownership of assigned technologies and services.


• Strong written and verbal communication skills with the ability to collaborate across technical, engineering, and support teams.


• Ability to create and maintain accurate technical documentation and operational procedures.


• Demonstrated ability to evaluate customer IT requirements and develop effective infrastructure solutions.

Desired

• Experience supporting a zero‑trust architecture or security environment.


• Familiarity with containerization technologies, including Docker or Podman.


• Enterprise‑level macOS administration experience.


• Familiarity with WinMagic SecureDoc or comparable full‑disk encryption technologies.


• Exposure to device‑control technologies such as USBGuard, DriveLock, or Microsoft Defender.

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

$103,800 - $218,100

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.