Zbyszko C. (Zip) Trzyna, 68, a retired captain in the Navy civil engineering corps who later was a construction project manager for the Navy Mutual Air Society in Vienna, died of an aneurysm Saturday at Fairfax Hospital. He lived in McLean.

Capt. Trzyna was born in Kracow, Poland, and moved to the United States with his family as an infant. The family settled in the Chicago area and the future Naval officer graduated from the Illinois Institute of Technology with a bachelor's degree in civil engineering in 1936.

Prior to World War II, he was a project engineer for the Army Corps of Engineers at Chanute Field in Illinois. He began his Naval career in 1943 as an officer in the "Seabees," the Navy's construction battalion, serving in the Pacific.

His postwar assignments included the Naval base at Guantanamo Bay, Cuba, Washington and other stations in this country. Capt. Trzyna's last assignment was as director of industrial resources and favilities at the Naval Ordnance Systems Command. He held that post from 1970 unitl his retirement in 1974 and was credited with carrying our a program to modernize the Navy's industrial capacity.

He then went to work for the Navy Mutual Aid Association and was in charge of construction projects for it in Vienna. He retired a second time in 1979.

Survivors include his wife, Irene, of McLean; a daughter, Diane Zabaronick of San Diego, Calif.; tw o brothers, Thaddeus of Pasadena, Calif., and Charles, of Long Grove, Ill., and one granddaughter.

The family suggests that expressions of sympathy be in the form of contributions to the Seabee Memorial Scholarship Association Inc., P. O. Box 37229, Washington, D.C. 20013.