Edward J. Hatfield Jr., 65, a management consultant and a retired regional marketing manager for the General Electric Co., died Tuesday at Veterans Hospital in Washington. He had cancer.

An engineer, Mr. Hatfield joined General Electric's Engineering Laboratory in Schenectady, N.Y., in 1936.Before transferring to the Washington area in 1961, he had worked for the company's Knolls Atomic Power Laboratory in Niskayuna, N.Y. He was regional marketing manager of General Electric's light military electronics department here before retiring in 1963. He then established a management consultant firm.

He was born in Highland Falls, N.Y., and grew up in Annapolis. He earned a bachelor's degree in electrical engineering and physics from Johns Hopkins University, where he also did postgraduate work in physics.

A retired Army lieutenant colonel, he was an executive officer for policy planning in the Signal Corps in Europe during World War II.

He lived in Fairfax and was a member of the Military Order of the World Wars, Citizens for American Survival, the National Security Industrial Association, the Armed Forces Communications and Electronics Association and the National Aviation Club.

Survivors include his wife, Bella G., of Fairfax; two sons, Edward J. III. of Jericho, Vt., and Steven W., of Fairfax; his mother, Mrs. E. J. Hatfield Sr. of Annandale; a sister, Mrs. Robert Kirchgessner of Paterson, N.J.; two brothers, F. Orville, of Tucson, Ariz., and Dr. William H., of Winchester, Va., and two grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Temple Hill Baptist Church in Bethesda.