Imutan and Itliong decided to join the march during the pilgrimage organized by Chávez and the NFWA in April 1966. After AWOC and NFWA merged, he was part of the National Executive Board of the newly formed United Farm Workers Organizing Committee (UFWOC), together with Itliong and Philip Vera Cruz. He became an organizer and picket in the fields. He was sent to Baltimore in 1967 to organize the boycott, and he went later to New York City, where Ethel Kennedy organized a fundraiser in South Hampton for the union. He organized asparagus workers in Stockton and later became director of the Delano office. In 1977, Imutan organized and led César Chávez’s tour to the Philippines, where they were the guests of Philippines President Ferdinand Marcos.