Mahasoa oversees Blue Ventures' health education activities, and water and sanitation work, as part of the Safidy community health programme. Every two months his team visits 20 communities on the village outreach tour; teaching in schools, supporting youth clubs and giving community presentations. Mahasoa also facilitates the community-led total sanitation (CLTS) initiative and develops health-related radio programming.
Mahasoa received both his Bachelors and Masters degrees in Arts & Literature from the University of Toliara. During the course of his studies, he served as an HIV/AIDS educator for the Ambovombe-based NGO Mamy, and worked for five years as a radio presenter for both the Feon'ny Fanantenana and University of Toliara radio stations, producing educational programming and hosting shows. Mahasoa also worked for nearly three years on UNICEF's nutrition, water and sanitation programme (PAEAR), developing radio content for behaviour change and organising listening groups.