Nov 2016 – Apr 2022
NYC Department of Correction
Senior Systems Administrator · Queens, NY
Managed infrastructure and identity for one of the largest municipal correctional agencies in the country — supporting tens of thousands of users, maintaining near-perfect patch compliance, and leading a large-scale Windows 11 migration.
Tech Stack
Key Contributions
Ran hybrid Active Directory and Azure AD environments supporting 15,000+ users, owning GPO architecture, identity sync, and group policy standardization across the agency.
Built and deployed standardized Windows OS images using SCCM task sequences and PowerShell, reducing provisioning time by 40%.
Drove monthly patching operations across 8,000+ systems using SCCM and WSUS, consistently achieving over 99% compliance.
Led a 6,000-device migration to Windows 11 and Azure AD — scoping readiness, coordinating rollout, and validating device compliance at each phase.
Served as Tier-3 escalation point for complex endpoint failures, GPO conflicts, and Microsoft 365 performance issues.