To answer your question directly, I would say yes. But I would say they are more on the side of constantly filled. I have had some experience at a VA hospital and after speaking to other outpatient pharmacists, I have learned that many pharmacist start and end their career at the VA because of the work-life balance, level of comfort and amazing benefits.
But if you are truly looking for ambulatory care pharmacy and federal hospital, consider the Indian Health Services (IHS), they are constantly recruiting pharmacist (of course in certain geographical locations).