Cantrill is probably the most well-known. Long-time Solaris advocate, worked on Joyent for a long time, etc. You'll find his fingerprints on a lot of stuff. It'd be hard to find someone more capable of building on-prem cloud infrastructure at a systems level, I think.

Frazell is pretty well known for Docker and container-oriented stuff. I think she was at Google for a while, but maybe Microsoft? Somewhere big doing cloud things, for sure, though.

I don't know the other person. But, I would guess they have to be reasonably impressive to be on this team.