I’m a systems admin. Last week, I had an employee using a VPN to try and hide their traffic. My monitoring software caught it. I couldn’t see the traffic, but I could see it connected to a known Tor IP. My system saw the fishy connection and sent the alert. Just be careful and don’t assume you’re completely safe with the VPN.
It’s best to assume your IT department can see everything you do, and keep personal stuff on personal devices.