Lo is Director of Preah Vihear Provincial Health Department, Cambodia.

In this role, his main focus is to improve the quality of care for all patients across all health facilities in the province regardless of social barriers, class, race, or political affiliation. He works to improve access to health information and health services, especially for remote patient populations, and he spearheaded an initiative to support high-risk pregnant women. Previously a hospital director and provincial HIV/AIDS program manager, Lo is a medical doctor by training with expertise in public health.

Lo is chairman of a provincial working group in health and collaborates regionally in cross-border meetings for sharing health information.