Patrick "Pat" Cavit, also known by his handle Tivac, was the Lead Web Programmer at ArenaNet. Pat's work included the Guild Wars 2 API and the implementation of the Black Lion Trading Company interface. He posted announcements and answers player questions regarding those two features on the Guild Wars 2 forums. In January 2017, he moved on to work at Amazon.
- Pat's handle "Tivac" is his last name spelled backwards.