Senior IT Systems Administrator – Enterprise Security

Applied Physical Sciences Corp (APS); Connecticut; On-site; USD 110,000 - 140,000; Full time

Job summary

Applied Physical Sciences (APS) seeks a Senior IT Systems Administrator to strengthen enterprise IT operations in Groton, CT and oversee cybersecurity compliance across on‑prem and cloud environments.

The role emphasizes advancing NIST 800-171 and CMMC frameworks, vulnerability management, and end‑to‑end system support. U.S. citizenship and a DoD security clearance are required. Competitive benefits accompany a dynamic team.

Qualifications

• 7+ years in IT operations or equivalent role with enterprise scope.
• Experience across desktop support, server admin, virtualization, and cybersecurity operations.
• Familiarity with Microsoft 365 administration and Windows enterprise environments.
• Experience supporting regulatory compliance programs (NIST 800-171, CMMC).
• Ability to obtain/maintain a DoD Secret security clearance (U.S. citizenship required).

Responsibilities

• Contribute to IT and cybersecurity compliance initiatives, including NIST 800-171 and CMMC, by writing/revising policy, implementing processes, and maintaining audit records.
• Design, deploy, implement, and support new technologies for end users and administrators across on‑prem and cloud environments.
• Lead and support IT break/fix escalations, operations, updates, lifecycle refreshes, and add/change activities.
• Help manage records labeling and retention efforts.
• Manage and remediate vulnerabilities in CUI and higher classification networks to maintain a secure, compliant enterprise environment.
• Support cybersecurity monitoring, analysis, and response efforts.

Skills

Enterprise IT systems

Desktop support

Server administration

Virtualization

NIST 800-171 / CMMC

Microsoft 365 administration

Windows enterprise

Cybersecurity operations

DoD security clearance

Job description

Applied Physical Sciences (APS) seeks a Senior IT Systems Administrator to strengthen enterprise IT operations in Groton, CT and oversee cybersecurity compliance across on‑prem and cloud environments.

The role emphasizes advancing NIST 800-171 and CMMC frameworks, vulnerability management, and end‑to‑end system support. U.S. citizenship and a DoD security clearance are required. Competitive benefits accompany a dynamic team.