ROBERT V. OXENHAM, 70, a retired executive vice president of the Marsh & McLennon Inc. insurance company who had been active in professional and service organizations, died of heart ailments July 16 at Montgomery General Hospital in Olney.

Mr. Oxenham was a past president of the D.C. Association of Insurance Agents and was named its member of the year in 1967. He also was a past president of the D.C. chapter of Chartered Property Casualty Underwriters and a regional vice president and director of the national organization.

In 1965, Mr. Oxenham was chosen man of the year by the Bethesda YMCA. He was a member of the Washington Rotary Club and the Kenwood Golf & Country Club, and also was an elder of the Bethesda Presbyterian Church.

A resident of Rossmoor Leisure World in Silver Spring and a former resident of Bethesda, Mr. Oxenham was born in Baltimore. He grew up in Washington and graduated from McKinley Technical High School. In 1938, he graduated from the University of Virginia with a degree in business and in the same year joined Victor O. Schinnerer & Co., insurance brokers.

During World War II he served in the Navy in the Southwest Pacific.

He returned to the Schinnerer company after the war and was its senior vice president in 1970 when it merged with Marsh & McLennon Inc. He was executive vice president of Marsh & McLennon until he retired in 1981.

Survivors include his wife, Helen W. Oxenham of Silver Spring; one son, John W., also of Silver Spring; two daughters, Anne Malone of Potomac and Joan Pyne of Baltimore, and four grandchildren.