(There are quite a few of us in this thread, fwiw: brson and pcwalton are Mozilla employees working on Rust and Servo; sanxiyn, bjz_, steveklabnik and I are volunteers, just from the handles I recognise.)
sanxiyn is actually a Samsung employee, and on their behalf has contributed to Rust in the past. IIRC he's not currently employed to work on Rust, though he's still an active community member.