Just to be clear, are you "the" or "one of many" Tech Lead(s) at Google for AMP?
In terms of the AMP open source project governance rules I am THE tech lead. https://github.com/ampproject/amphtml/blob/master/GOVERNANCE...
I also manage a team at Google that works full time on the AMP open source projects and act as an overarching tech lead, but there are several sub teams that have specialized tech leads (e.g. for UI, ads, analytics, caching, etc.).
Is that what you wanted to know? :)