Robert Inman Bouck, 89, a retired Secret Service agent who protected six presidents, rose to administrative positions in several divisions of the agency and later provided security services for the Federal Reserve System, died of congestive heart failure April 27 at the Powhatan Nursing Home in Falls Church.

Mr. Bouck was born on a farm near Elkton, Mich. He studied electrical engineering at Michigan State University for two years, then switched to police administration and interned with the Michigan State Police. He received a bachelor's degree in police administration in 1939.

He entered the Secret Service on Sept. 5, 1939, as one of the first two agents with college degrees in police administration. He was rejected for active-duty service in the Army during World War II because of high blood pressure, but that condition did not prevent him from providing physical protection for presidents from Franklin D. Roosevelt to Richard M. Nixon.

Mr. Bouck also held positions as director of personnel, supervisor of the counterfeit division, director of training and inspector of the inspection and audit division.

When he retired in 1969, Mr. Bouck was special-agent-in-charge of the special investigations and security division.

After leaving the Secret Service, Mr. Bouck was a security consultant to the Board of Governors of the Federal Reserve System. For nearly 20 years, he advised the board and individual Federal Reserve banks on security issues, including the design, installation and performance of security systems, the review of construction and renovation proposals and selection of contractors.

After completing his work with the Federal Reserve, Mr. Bouck was a consultant to the central banks of several nations, including Bolivia, Singapore and the Netherlands.

Mr. Bouck was a founding member and president of the Association of Retired Secret Service Agents.

He was a deacon and elder of Falls Church Presbyterian Church since 1953. He also served as president of the men's council and chairman of the property and maintenance, Christian education and personnel committees.

Survivors include his wife, Marjorie Dinan Bouck of Falls Church; three children, Judy Porter of New York City, Robert Bouck of Richmond and James Bouck of Chantilly; four grandchildren; and a great-grandson.