But he's almost never left without making an impact where he worked at, no matter how short of a sting: DEC (21164/21264) -> AMD (K7/K8) -> SiByte/Broadcom -> P.A. Semi (bought by Apple, A4/A5) -> AMD (Ryzen) -> Tesla (not sure about his impact) -> Intel (no visible impact so far).

Also, from those only his first stint at AMD can be considered "not staying long", most of the other positions were held for some years.