Systems Engineer/Administrator Lead

CACI•Danbury, CT

10d

About The Position

CACI is seeking a Classified Systems Engineer/Administrator to support and maintain mission-critical classified information systems in a secure environment and serve as the site lead in Danbury, Connecticut. The role combines systems administration and systems engineering, with responsibility for Microsoft Windows Server infrastructure, virtualization, enterprise applications, storage, identity and access management, and cybersecurity tools. The Systems Engineer/Administrator Lead works with technical and security teams to maintain system performance, address vulnerabilities, support configuration changes, and ensure classified systems comply with applicable DoD, DCSA, and NISPOM requirements. The position may involve up to 10% travel within the continental United States and scheduled after-hours maintenance, upgrades, incident response, or outage support as mission requirements dictate.

Requirements

Active TS/SCI clearance with polygraph.
Bachelor's degree in Information Technology, Computer Science, Systems Engineering, Cybersecurity, or a related discipline, or an equivalent combination of education, technical training, certifications, and professional experience.
At least 7 years of relevant systems administration, systems engineering, or related enterprise IT experience.
CompTIA Security+ certification or another applicable DoD-approved cybersecurity certification.
Extensive experience administering Microsoft Windows Server environments, including installation, configuration, patch management, maintenance, troubleshooting, and performance optimization.
Hands-on experience supporting virtualization technologies such as VMware, Hyper-V, and/or Nutanix.
Experience identifying and remediating system vulnerabilities and implementing security mitigations using enterprise vulnerability tools.
Expertise in Active Directory and Group Policy.
Linux experience, preferably Red Hat.
Networking experience, including Cisco, datacenters, and firewalls.
Proven experience leading projects, managing large teams, and working with leaders on the high-side.

Nice To Haves

Experience with Red Hat Linux.

Responsibilities

Install, configure, administer, maintain, and troubleshoot Microsoft Windows Server and Linux operating systems across classified environments.
Manage VMware, Microsoft Hyper-V, and Nutanix virtualization platforms to ensure availability, performance, scalability, and security.
Administer enterprise services and applications, including Microsoft Exchange and Microsoft SQL Server.
Troubleshoot and resolve complex hardware, software, networking, operating system, application, and infrastructure issues across classified networks.
Manage enterprise storage platforms, including Pure Storage, Dell PowerVault, and Synology appliances.
Administer Microsoft Active Directory, including user provisioning, access modifications, permissions, Group Policy, DNS, and DHCP in accordance with security requirements.
Maintain inventory, configuration, and accountability records for classified IT assets, removable media, hardware, and peripheral equipment in accordance with DCSA requirements.
Prepare and submit Security Impact Analysis (SIA) packages for proposed hardware, software, system, and configuration changes, and coordinate approvals before implementation.
Mentor junior technicians and system administrators, share technical knowledge, and support consistent system administration practices.
Collaborate with cybersecurity, engineering, infrastructure, and program teams to identify technical risks and implement secure, sustainable solutions.
Participate in scheduled after-hours maintenance, system upgrades, incident response, and outage support as mission requirements dictate.
Lead projects, manage large teams, and work with leaders on the high-side.