Foreign Minister Vivian Balakrishnan welcomes Ambassador Sinha to S'pore. #singapore #us #politics Ambassador Anjani K. Sinha, MD arrived in Singapore to begin his tenure as the United States Ambassador to the Republic of Singapore. “I am deeply honoured to represent the United States in Singapore, a friend of the United States that is a leading hub for American business and a pillar of regional stability,” Ambassador Sinha said, upon his arrival.