In 1962, Duenas became a founding member of the Guam Employees Federal Credit Union. That year, Duenas and 18 other Guam government employees deposited a total of $250 USD to establish the new credit union. The GGEFCU has grown substantially in terms of assets since 1962. Duenas served Guam as a public servant and politician for twenty-eight years. He worked in the Department of Administration as the auditor and chief accountant. He also served as the chairman of the board of the Guam Housing Corporation and the vice president of financial affairs for the University of Guam. Duenas, a member of the Democratic Party, was elected as a Senator in the Guam Legislature, where he served from 1971 until 1978. While in the legislature, he became the minority leader of the 14th Guam Legislature. During this time, he wrote a series of monthly columns detailing pressing social and political problems facing the island. Duenas became the chairman of the Democratic Party of Guam for three years during the 1980s. In 1990, Duenas unsuccessfully ran for Lt. Governor as the running mate of Madeleine Bordallo in the gubernatorial election. He also worked as the campaign treasurer for Guam Senator Frank Aguon Jr.
Death
Ping Duenas was hospitalized in Guam Memorial Hospital for a week in August 2009. A decision was made to transport him to a medical facility in Anaheim, California, for medical treatment. Duenas suffered a heart attack approximately an hour before the plane was scheduled to land in Anaheim on the flight from Hawaii on August 31, 2009. He died on the plane en route to Anaheim at the age of 78. His wife, Ling Duenas; son, Tommy; and brother, Dr. Vicente Duenas; were with him at the time. Duenas' family informed the Speaker of the Guam Legislature, Judith Won Pat, that Duenas did not want a state funeral. His viewing and funeral mass were held at the Santa BarbaraCatholic Church in Dededo. He was buried at the Guam Memorial Park in Barrigada. He was survived by his wife, Rosario "Ling" Perez Duenas; four daughters, Gerardlyn, Carina, Marcella and Julienne; four sons, Joseph, Daniel, Anthony and Thomas; and many grandchildren and great-grandchildren.
