Hands-on IT Infrastructure and System Administrator supporting a diagnostic company's local IT environment. Responsibilities include maintaining network security and reliability, managing workstations and user lifecycle, providing helpdesk support, administering firewalls and backups, and collaborating with Headquarters IT on infrastructure projects. Requires 5+ years of IT experience, independent work capability in a one-person environment, and proficiency with Office 365, MS SQL Server, VMware, DNS, firewalls, and backup/recovery tools.