Dr, a native of Berlin, Germany, is a retired brewmaster who spent most of his career with Anheuser-Busch. Zastrow began his brewing career in 1949 as an apprentice at the Englehardt Brauerei in Berlin. He then worked at several other breweries and malt houses in Germany and Switzerland, including Spaten Brauerei and Kronenburg Brauerei. He graduated as a certified brewery engineer from the Technical University in Berlin and earned his PhD in agricultural science from the university in 1963.

He then joined the staff of Anheuser-Busch as a brewing technologist and scientific advisor to the senior vice president of brewing. Later, he spent 15 years as vice president for brewing technical services, where he was responsible for applied brewing research, product development, serving as a liaison for international, government, and legal affairs, and plant protection for raw materials.

Upon his retirement from the company in 1993 he became an instructor for the Budweiser Mobile Beer Schools and worked as a primary instructor for the Budweiser Beer School (a promotional program featuring a short class designed to teach members of the general public the basics of beer production and tasting), where he was responsible for both conducting and coordinating activities related to the program. Greatly admired and respected in the brewing world, he is the author of several scientific papers and was a sought-after lecturer because of his extensive brewing knowledge and innovation in the field.

Zastrow is also a member of the extended faculty for the Siebel Institute of Technology and serves as an independent consultant in the brewing industry.

See also siebel institute of technology.