> and we've had a rash of folks come in, learn what they can, and then depart, leaving us to repeat the cycle all over again. It's taking a toll, so we're actively seeking people who are committed to the long run so that the energy we invest in education has a decent return.

In my experience this may be a sign that your company does not offer anything that retains people.

If people conclude that there is no growth opportunity and/or that the overall conditions are poor they will leave within 2 years even if they want to be committed for the long run.