Alex Wilding, 72, a retired captain in the U.S. Naval Reserve who later worked here for the Ling-Iemnpo aerospace corporation, died of cardiac arrest Monday in an Atlanta hospital. He had suffered an aneurysm two weeks earlier while en route from California to Sea Island, Ga.

Capt. Wilding was stationed at the Bureau of Naval Weapons here when he retired from the Navy in 1963. It was the third time he had been stationed here during his military career.

After leaving the Navy, he worked for a Lingo-Tempo subsidiary in Hawaii for six years. He returned to this area in 1969 and worked in the company's Washington offices until his second retirement in 1973. A former resident of Arlington, he had lived in La Jolla, Calif. since 1975.

Capt. Wilding was born in Lenexa, Kan. He was a graduate of Whittier College in California and earned a master's degree in business administration from the University of Southern California. He entered the Navy in 1942 and during World War II served as a task force combat intelligence officer of the USS Yorktown and other aircraft carriers in the Pacific.

He is survived by his wife, Marygean, of La Jolla; two daughters, Patricia Wilding Reimann of Palatine, Ill., and Holly K. Wilding Volatile of Arlington; and two grandchildren.