Wellington A. Gillis, 55, an administrative law judge with the National Labor Realtions Board, was injured fatally Saturday while riding a motor-bike in Bermuda.

President of the Middle Atlantic Tennis Association, he was in Bermuda for a week's tennis outing with his wife, Helen, and three other Washington-area couples.

Mr. Gillis also was head of the Northern Virginia Tennis League, which he organized, and president of the Virginia Tennis Association.

Born in Malden, Mass., he served as a bomber pilot with the 15th Air Force in Italy in World War II. His B-24 was shot down on a combat mission and he was a prisoner of the Germans for four months.

After graduating from the University of Alabama and receiving a law degree from Duke University, Mr. Gillis joined the NLRB as an attorney in 1952.

He became a supervising attorney on the staff of the NLRB general counsel in 1956 and was chief of the advice branch and deputy assistant general counsel before his appointment in 1960 as a trial examiner. That title later became administrative law judge.

Mr. Gillis was a past president of the Springfield Golf and Country Club in Virginia.

In addition to his wife, he is survived by four children, Gregor, Tighe, Donald and Stacy, all of the home in Springfield; another son, Edward, also of Springfield, and a brother, Edward, of California.