The annual Time list, which recognises activism, innovation and achievement, has named Singh, the founder and executive director of GlobalMedic, as one of the 100 most influential people in the world, as a global leader in disaster relief.
Singh and his group of 20 volunteers arrived in Port-au-Prince soon after the earthquake and provided clean drinking water and medical aid wherever it was needed, the magazine said.
In eight weeks, he and his team distributed 2.4 million gallons of clean water. GlobalMedic's two inflatable field hospitals brought medical assistance to over 7,000 people.
GlobalMedic has offered its services worldwide during 50 disasters in the last 12 years.