I don't know about OCs with 10+ years experience all-time, but there are only ten HCs who have had their job as long as Lobo has been our OC, so that's where I started looking.
The only two coordinators on either side of the ball that I could find who have been a coordinator at same school as long as Lobo has been here were Bud Foster as the DC at VT (hired 1995) and Mark Banker as DC at Oregon State (hired 2003)
Additionally, there just aren't a lot of guys who have been at the same schools for 10+ years under the same Head Coach and then became coordinators - here are the ones that I could find:
Jarrett Anderson has been at TCU since 1998, but only because the Offensive Coordinator in 2009 and Dick Bumpas has been the DC for the Horned Frogs since 2004.
Mike Bobo has been at Georgia since 2001, but wasn't promoted to Offensive Coordinator until 2006.
Dave Steckel has been at Missouri since 2001, but coached only LBs until 2009.