I'm sure it depends on the company and how it is organized. We had design groups that handled most hardware and software design. Those engineers only worked on a program until the production design was finalized, at which point they usually went to a different program, sometimes in a completely different city.
We also had a third category, who were the engineers that worked in support activities like manufacturing and failure analysis. They might have the same "job" for years on end, but the job itself changed constantly.
We also had a third category, who were the engineers that worked in support activities like manufacturing and failure analysis. They might have the same "job" for years on end, but the job itself changed constantly.