Best rule of thumb I've seen on this: 3 jobs/roles over 10 years. Many people do a quick jump when they've hit the wrong environment, as long as that is not st

Best rule of thumb I've seen on this: 3 jobs/roles over 10 years. Many people do a quick jump when they've hit the wrong environment, as long as that is not standard behavior it's OK, and even a good thing. You do want to see some ability to stick a good company. On the long side, company matters. 12 years at Google would be very different (especially with role variety) from 12 years (especially without role variety) at a stagnant government department.