Tier 2 Systems Administrator

CACI International Inc; Springfield (VA); On-site; USD 86,600 - 181,800; Full time

Job summary

CACI International Inc in Springfield, VA is seeking a Tier 2 Systems Administrator to join our IT team. You will serve as escalation point for Tier 1 and maintain mission‑critical systems, ensuring security and performance while supporting end users.

The role requires TS/SCI with Polygraph, IAT II Security+, 2–4 years of hands‑on IT experience, and strong skills in VMware, AD, DNS, and Group Policy. Weekly on‑call rotation and after‑hours support are required.

Qualifications

• Must have an active TS/SCI with Polygraph.
• Must have at least an IAT Level II Certification such as Security+.
• Must be willing to participate in weekly day support hours rotation – 7‑3, 8‑4, 9‑5, 10‑6 and an after‑hours on‑call support rotation.
• 2‑4 years of hands‑on experience in a system or IT support role.
• Strong knowledge and experience with command line in a Unix environment, Windows Server, Windows desktop, Active Directory, DNS, and Group Policy.
• Experience with virtualization technologies (VMware).
• Proficiency in troubleshooting custom software, network connectivity and performance issues.
• Strong understanding of security best practices and data protection.
• Excellent communication and interpersonal skills.

Responsibilities

• Provide advanced technical support for hardware, software, database, custom software and network‑related issues escalated from Tier 1.
• Administer and maintain servers (Windows, Linux, Solaris), desktops and applications, printers and peripheral equipment, Active Directory and virtual environments (VMware).
• Perform system health checks, monitor system performance and ensure backups are running for restoration capability.
• Assist in onboarding/offboarding of users, including account setup and access controls.
• Document technical issues, solutions, and processes in ticketing systems and knowledge bases.

Skills

TS/SCI with Polygraph

Unix command line

Windows Server administration

Active Directory

DNS

Group Policy

VMware

Communication skills

On-call support

Education

IAT Level II Certification such as Security+

Tools

VMware

Active Directory

DNS

Group Policy

Windows Server

Job description

Job Title: Tier 2 Systems Administrator

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

The Opportunity

We are seeking a skilled and motivated Tier 2 System Administrator to join our growing IT team. In this role, you will serve as an escalation point for Tier 1 support and be responsible for maintaining and troubleshooting mission‑critical IT systems, supporting end users, and ensuring the security and performance of our infrastructure. This position is ideal for a tech‑savvy professional with strong problem‑solving skills and a passion for technology.

Responsibilities

• Provide advanced technical support for hardware, software, database, custom software and network‑related issues escalated from Tier 1.
• Administer and maintain servers (Windows, Linux, Solaris), desktops and applications, printers and peripheral equipment, Active Directory and virtual environments (VMware).
• Perform system health checks, monitor system performance and ensure backups are running for restoration capability.
• Assist in onboarding/offboarding of users, including account setup and access controls.
• Document technical issues, solutions, and processes in ticketing systems and knowledge bases.

Required Qualifications

• Must have an active TS/SCI with Polygraph.
• Must have at least an IAT Level II Certification such as Security+.
• Must be willing to participate in weekly day support hours rotation – 7‑3, 8‑4, 9‑5, 10‑6 and an after‑hours on‑call support rotation.
• 2‑4 years of hands‑on experience in a system or IT support role.
• Strong knowledge and experience with command line in a Unix environment, Windows Server, Windows desktop, Active Directory, DNS, and Group Policy.
• Experience with virtualization technologies (VMware).
• Proficiency in troubleshooting custom software, network connectivity and performance issues.
• Strong understanding of security best practices and data protection.
• Excellent communication and interpersonal skills.

Desired Qualifications

• Scripting knowledge (PowerShell, Python, Bash, etc.).
• Experience with ticketing systems (e.g., ServiceNow, HelpNow, Jira, Confluence).
• Exposure to ITIL practices or formal change‑management best practices.
• Prior experience supporting real‑time operations / Mission Critical infrastructure.
• Familiarity with Cisco switches and firewalls.
• Familiarity and experience with infrastructure monitoring tools (SCOM preferred).

Benefits

We offer a comprehensive benefits package designed to support and protect employees and their families. Benefits include healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

Pay Range

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.