All of the people we contact and work with through NPGS are Federal employees of USDA. As I said earlier, UCD owns Wolfskill but leases some of it to the USDA. Howard Garrison, Jeff Moersfelder, Malli, and others all have USDA email addresses. At one time they did have UCD email addresses as they also operated on UCD's computer network, but that changed quite a few years ago. I see a couple of "research affiliate position have UCD email addresses at http://www.ars.usda.gov/PandP/locations/people.htm?modecode=53-06-20-00, but that's it.
I'm not very important in the scheme of things but know how things operate pretty well since I was involved in an import project. As you know, I farm chestnuts. The dean of the School of Ag and his wife are both former chestnut researchers and they've been to my farm and I've been to their home. I once asked for help in importing some chestnuts and the dean's wife put me into contact with Foundation Plant Material Services which also leases land on the UCD campus (directly south of NPGS). Funny, my seemingly small request got chestnut researchers across the U.S. to meet along with UCD staff and NPGS staff (Chuck Simmons, former curator). There was discussion of including a chestnut repository at Wolfskill but Simmons requested that UCD lease it a little more land on which to do this. Even though the dean and his wife were nuts about chestnuts, the university needed the land itself for other needs so it never happened. It wasn't a big deal, but it was mentioned to me a couple of times by Malli. Believe me, they are separate.