I mean, Vance's first job in VC was becoming a partner at Thiel's Mithril Capital in 2015, then he moved to Revolution LLC which was founded by Steve Case (of AOL fame), then he co-founded a VC firm with a former colleague from Mithril and funding from Peter Thiel.
So I mean, he's not "big tech" in the sense of working with or for the few huge corporations that control what we see and read and how we do it, but he's "big tech" in the way of being highly influenced by Silicon Valley billionaires and their "government just gets in the way, down with regulations and laws so I can get more wealth and power" ethos.