Thomas W. Granzow, 78, a businessman who later worked as a manager on drug abuse with the federal substance abuse prevention program, died July 5 of complications of Alzheimer's disease at the Hebrew Home of Greater Washington. He was a resident of Chevy Chase.

Dr. Granzow directed the review of applications for alcohol and drug abuse prevention grants focused on high-risk youth. He retired from the federal Substance Abuse and Mental Health Services Administration's Center for Substance Abuse Prevention in 1996.

Dr. Granzow's career spanned the military, business and academic communities. A management consultant for 10 years in the 1980s, he analyzed public and private programs that involved youth development and drug abuse prevention. Dr. Granzow became familiar with both the demand and supply aspects of the war on drugs, working with the Justice Department's Organized Crime Drug Enforcement Task Force and with the Substance Abuse and Mental Health Services Administration.

He was a project director for a Department of Labor Jobs Corps contract that produced a study of residential living for the corps.

Dr. Granzow devoted the latter part of his career to finding prevention solutions, said his wife, Dr. Rita Schonberg. "He was such an interesting and good man. He tried to help people," she said. "He wanted to make the world better."

Born in Benton Harbor, Mich., he ran away and tried to join the Army at 15. He eventually enlisted in 1943 and served as a rifleman in Germany during World War II.

Following the war, he attended Michigan State University and joined the enlisted Reserve Corps as an intelligence specialist. He graduated with a bachelor's degree in psychology and was commissioned a second lieutenant in the Army's Military Police Corps.

After working for a year in Michigan, he was recalled for two years to serve as a military police operations officer in the Korean War. His military honors included the Bronze Star and Purple Heart.

From 1953 to 1977, he served in the U.S. Army Reserve as a military police officer and as a provost marshal in the Army Reserve Command. He retired from the Reserve with the rank of colonel.

In 1978, he designed and directed a recruiting campaign that resulted in more than 11,000 new reservists in one month. He was awarded the Meritorious Service Medal.

Simultaneous to his military career, he held positions of increasing leadership in the transportation industry. Starting in 1954, he was the manager-owner of several taxi, livery and air freight trucking companies in Chicago. He held executive positions in Chicago and New York with Emery Air Freight, Seaboard World Airlines and the Del Monte Corp.

By the late 1970s, Dr. Granzow's career had shifted to academia as he pursued advanced degrees. He was director of the Thunderhill Children's Center and an assistant professor of education at the old Antioch University in Columbia. He also was a research assistant in development psychology at Catholic University.

He received master's degrees in education in 1976 and in psychology in 1978 from Antioch University and a PhD in developmental psychology from Catholic University in 1988.

Dr. Granzow was dean of the Antioch School of Law during the school's transition and closeout year in 1987-88; the following year, he served as provost of Antioch University in Philadelphia, managing all aspects of the small college.

His wife Barbara Granzow died in the early 1950s. A son from that marriage died in 1974.

His marriage to Bjorg Granzow ended in divorce. A son from that marriage, Jack Edward Granzow, died in 1995.

In addition to his wife, whom he married in 1981, of Chevy Chase, survivors include two children from his third marriage, Elizabeth Faith Granzow of Berkeley, Calif., and Michael David Granzow of Chevy Chase; a sister; and a grandson.