Jack Isicson, 64, the founder and president of a wholesale electronic supply company in Alexandria who was active in boating, died of cardiac arrest Sept. 15 at Fairfax Hospital. He lived in Falls Church.

Mr. Isicson was born in New York City. In 1938, he moved to the Washington area and went to work for the Department of Agriculture. He later worked for the Navy Department, at the Washington Navy Yard and at the Naval Torpedo Factory in Alexandria. After World War II service in the Army, he returned to the Navy Yard.

At the same time, he began selling electronic equipment on a parttime basis. In the late 1940s, he established J & R Electronics, an electronic supply company. This soon became Certified Electronics, Inc., with offices in Alexandria. Mr. Isicson continued to head the firm until his death.

In boating, Mr. Isicson was a member of the Potomac River Power Squadron, where he took part in navigation contests and other activities. He was a founding member of the Northern Virginia Power Squadron and a member of the Selby Bay Yacht Club in Annapolis, of which he was commodore in 1967.

Mr. Isicson also was a Mason, a Shriner and a member of the Odd Fellows.

Survivors include his wife, Ruth (Rudy), whom he married in 1938, of Falls Church; a son, Alan, also of Falls Church; a daughter, Anita Isicson of Washington; a brother, Harold, of Indiana; a sister, Claire Merle, of West Hampton Beach, N.Y., and three granddaughters.

The family suggests that expressions of sympathy be in the form of contributions to the Heart Fund of the American Heart Association, or to a charity of one's choice.