The Chef's Database
Came across this cool site with names of the chef at various restaurants.
So looking at a SF restaurant ... Aqua gets this info which lists the current chef and how long at that restaurant as well as the former chefs.
If you click on the name of the chef, you get their history
Certainly not comprehensive. I couldn't find a chef I like who I'm wondering about. However, nice info to have for the restaurants it does have. It is also world-wide and covers lots of small towns not just the metro areas.