Hey there @adrianniarouley - great question, and thanks for posting!

At this time, no, there is no way to prevent users in your Calendly organization from creating their own individual event types within their accounts. Users will also maintain the ability to manage their own calendar connections, Availability Schedules, integrations like Zoom and so on. 

I’m sorry for the inconvenience, but do hope the clarification helps.

p.s. check out our Company Admin Guide while you learn the ropes - it’s full of tips + tricks that you’ll likely find useful!