Born in Georgetown in British Guiana (now Guyana), Williams began drawing and painting at an early age. He received informal art tutoring from the age of three, and joined the Working Peoples' Art Class at the age of 12. After training as an agronomist he worked as an Agricultural Field Officer for eight years, initially on the sugar plantations of the East Coast and later in the North-West region of the country—an area inhabited primarily by the indigenous Warao people. His time among the Warao had a dramatic impact on his artistic approach, and initiated the complex obsession with pre-Columbian arts and cultures that ran throughout his artistic career.