Manage and optimize servers, desktops/laptops, network infrastructure (routers, switches, firewalls, WiFi, VPN), Active Directory, WSUS, antivirus, backups and NAS. Administer Cisco telephony (CUCM, UCCX, WxC), GPOs, and MS Visio documentation. Provide top-level support, collaborate on security and infrastructure projects, assist IT director, and participate in on-call/after-hours support.