[bcrl]

Depends on the role. When it's a highly complex system where it will take 6 months for the person to become a productive contributing member of a team, I have most definitely heard and been part of conversations where we considered if the person will stay around long enough to be worth the effort of training. On the other hand, for roles where it's a series of 1-2 month projects to make fairly straightforward changes to network protocol implementations, time to turnover for a new employee hasn't been a concern.

Of course a reasonable explanation for why a person has turned over jobs so many times can negate the concern. It really depends on the candidate. My point is that someone early in their career needs to recognize that there are both upsides and downsides to switching jobs frequently.