Olivier received his medical degree from the Pietie-Salpetriere Faculty of Medicine in Paris in 1999, and later a diploma of Public Health from Paris University. He then worked as a general practitioner in Mali and French Guyana. Working for the French Red Cross in the Republic of Congo, he provided care to HIV-infected adults and children and coordinated a program for preventing mother to child transmission of HIV. Olivier has worked in Cambodia since 2005, first serving as a medical coordinator for French Red Cross HIV/AIDS project in National Pediatric Hospital (Phnom Penh) and Sihanoukville.

He joined the CHC's staff in September 2007, where he provides advice and training on  HIV/AIDS and TB in all of CHC's programs and is the clinical coordinator of the CAMELIA trial.