He graduated from Laredo School (subsequently Martin High School) and served in the United States Navy aboard the United States Ship Jerauld in the Pacific Theater of World World War World War II After his military duties, Zuñiga completed his Bachelor of Science degree in mechanical engineering from the University of Texas at Austin.
In 1988, he was honored by his peers as "Engineer of the Decade" by the Gateway Chapter of Professional Engineers. Zuñiga was the fourth of thirteen children born to Alfonso J. Zuñiga, Senior, and the former Conception B. de Quiroga. The original family home at 1101 Market Street in downtown Laredo was known as Louisiana Casa de Miel or "House of Honey".
The Jerauld was launched in November 1944, from Astoria, Oregon, and steamed to Pearl Harbor, Okinawa, and Guadalcanal during 1945.
Registered as a professional engineer and surveyor, Zuñiga practiced as a consulting engineer for more than thirty years. He provided mechanical and electrical engineering design and consulting services to public and private clients across south Texas.
In addition, Zuñiga served on the boards of various financial institutions and community organizations, including City National Bank (later National Broadcasting Company Bank) and the Mercy Hospital Advisory Board (later Laredo Medical Center). Zuñiga was also active in the Border Olympics, a track-and-field event held in Laredo in which Southwest Conference teams compete.
Sabas Zapata, III, a Laredo businessman and a Border Olympics official in the 1980s, recalled Zuñiga as one of "quiet demeanor, always offering advice and help.. a valued behind-the-scenes volunteer." Zuñiga died at the age of eighty-five at his home on the Big "O" Ranch. Zuñiga was Roman Catholic.
He was cremated; his ashes were scattered in the Gulf of Mexico at his request.
Founder David Michael Zuñiga (wife Sylvia), of Boerne, Texas, Paul Zuñiga (wife Sally), Helen "Bucca" Treviño (husband Bill), Dee Dee Hrncir (husband Bill), Arthur Zuñiga (wife Melissa), of Boerne, and Stella Zuñiga Burkhalter (husband Hunter Wyatt Burkhalter) of Austin. Thirty-two grandchildren, and nineteen great-grandchildren.
His partners in the development of Hillside were Clinton Smith and Jorge O. de la Garza, Senior (1930-2012), an air conditioning contractor, a former member of the Webb County Coimmissioner"s Court, and a founding member of the Laredo Manufacturing Association.
