He worked first from "Rock Finder Observatory" (IAU code 652) in Calgary, Alberta, and now works from Arizona's Desert Beaver Observatory (919) and Desert Eagle Observatory (333).
Yeung a activat inițial la Rock Finder Observatory (cod IAU 652) din Calgary, Alberta, Canada, iar acum activează la observatoarele din Arizona – Desert Beaver Observatory (cod IAU 919) și Desert Eagle Observatory (cod IAU 333).