Office 365 Admin Center – user management, mail flow, license assignments QuickBooks Desktop & Online – installation, updates, troubleshooting VMware ESXi / vSphere – virtual machine deployment and maintenance AWS & Azure – VM provisioning, resource management, cloud support Active Directory – user/group policies, password resets, permissions Visual Studio Code / Android Studio – software and mobile app development Firebase / Firestore – backend for mobile/web apps Git & GitHub – version control and collaboration N-able, Bomgar, AnyDesk, LogMeIn – remote support tools