| Name | Phone Number | Room | Title | Department (Location) | |
| O'Brien Rupert | 619-660-3097 | Rupert579@cox.net | ESL Instructor | English as a Second Language (ESL) (Cuyamaca) | |
| Ojore Bushfan | Ojore.Bushfan@gcccd.edu | 60-125 | CalWorks/Counselor | CalWORKS (Grossmont) | |
| Olga Cordova | 619-660-4229 | Olga.cordova@gcccd.edu | A-301 | Admissions and Records Assistant | Admissions and Records (Cuyamaca) |
| Olga Sukhanova | 619-660-5301 | Olga_Sukhanova@gcccd.edu | ESL Instructor | English as a Second Language (ESL) (Cuyamaca) | |
| Olga Vienna | 644-7454 x3894 | Olga.Vienna@gcccd.edu | 50-590O | English Assoc Instr | English (Grossmont) |
| Olivia Krausie | 1619-644-7167 | Olivia.Krausie@gcccd.edu | 10-150 | Evaluations Advisor | Admissions and Records (Grossmont) |
| Omar Montano | Omar.Montano@gcccd.edu | Art Instructor | Art (Cuyamaca) | ||
| Ondrea Mesquita | 1619-644-7666 | Ondrea.Mesquita@gcccd.edu | 62-640B | Bookstore Purchasing Assist | Bookstore (Grossmont) |
| Ordaz Sanchez | Ordaz.Sanchez@gcccd.edu | Psychology Instr | Psychology (Grossmont) | ||
| Oscar Canedo | 644-7454 x3942 | Oscar.Canedo@gcccd.edu | History Instr | History (Grossmont) | |
| Osvaldo Torres | 660-4437/4048 | Osvaldo.Torres@gcccd.edu | A205/I118 | Counselor/Veterans Services/STEM Counselor | Counseling (Cuyamaca) |