I hope the good Doctor departed on good terms, however it seems unusual to have a NTC announcing he had departed the day before and detailing the rapid rescheduling of his appointments. Doesn't sound like an amicable parting of the ways.
I would guess his ability to perform HKCAD medicals is independent of his employment with Cathay. Wouldn't it be amusing if he set up an Office in opposition to CX Medical Department and held his position within CAD.
I thought he was decent chap.