This association helped setting up of similar associations in Uganda, Ethiopia, Tanzania and Rwanda. Darsi was the Secretary General for the 11th Congress of the International Diabetes Federation held in Nairobi in 1982. This conference attracted over 4,000 delegates and is the only conference of the federation that was held in Africa. From 1983 to 1985, Darsi served as the Vice-Chairman of the Kenya Association for the Prevention of Tuberculosis.
During his tenure with multi-national pharmaceutical industry, he set up stand alone marketing structures in Kenya that provided marketing support for over 19 countries in Eastern, Central and West African countries. He participated in numerous task forces and advisory panels in various therapeutic areas and pioneered multi detailing and marketing teams in the region. Numerous media campaigns in fast moving consumer goods were also designed during this period.
Darsi advised the National Drug Authority in Uganda and The Pharmacy and Poisons Board in Kenya in setting up of the registration processes for pharmaceuticals in Uganda and Kenya respectively. When the Government of Uganda in collaboration with UNAIDS, was setting up the Pilot Project for Access to Anti-Retroviral Therapy in Uganda he played a pivotal role in harnessing the synergies from pharmaceutical industry and the government sector.
In the last 18 years, Darsi has lead the company in various initiatives with local and international NGOs in increasing access to anti-retrovirals, drugs for opportunistic infections, reproductive health commodities and other interventions in the area of HIV/AIDS, Sexual and Reproductive Health and Infection Control.