Just had a look at the Member Directory. You could try George Nesbitt of Environmental Design/Build

His email is geoedb@idiom.com
I don't know anything about him other than he is from Berkeley.
I did find some members from Sanfran. but they were listed as associates.
Then again some timber framers are not members of the guild. I know the first place I worked, I was the only guild member.
Good luck hunting

Ian