A funeral mass for Andrew J. O'Reilly Jr., 62, who was fatally injured Monday when he was struck by a car near Robert F. Kennedy Stadium, will be held at 10 a.m. Friday at St. Patrick's Catholic Church in Rockville.

Mr. O'Reilly had been a construction engineer with the Naval Facilities Engineering Command since 1969 and was attached to headquarters.

For the past several years he had directed the construction of the Uniformed Services University of the Health Services on the grounds of the National Medical Center at Bethesda and the replacement of the Naval Hospital there.

Mr. O'Reilly also was director of construction at the Naval Ordance Laboratory at White Oak.

Born in New York City, he earned a degree in civil engineering from Manhattan College, and worked as an engineer in New York before World War II.

He served during the war with the 90th Construction Battalion of the Seabees in the Pacific and was discharged with the rank of lieutenant.

Mr. O'Reilly came to this area about 1950, and after serving as a partner of the Midland Concrete Construction Co. for a year, he established his own firm, O'Reilly Construction Co., Inc. He operated it until 1969.

A registered professional engineer, Mr. O'Reilly was a member of the American Society of Civil Engineers.

He is survived by his wife, Eleanor S., and two daughters, Ellen and Deirdre, all of the home in Rockville; three other daughters, E. Patricia Flores, of Potomac, Barbara Nevins, of Bethesda, and Andrea Curtis, who moved to Raleigh, N.C. from Olney several days ago; a son, Andrew J. III, of Wheaton; three brothers, Vincent, James and John, all of New York, and 10 grandchildren.