Strenk represented the United States at the 1968 Summer Olympics in Mexico City. He swam for the gold medal-winning U.S. team in the preliminary heats of the men's 4x200-meter freestyle relay. He did not receive a medal, however; under the 1968 international swimming rules, only those relay swimmers who swam in the event final were eligible to receive a medal.
Prior to the 1968 Olympics, Strenk was a member of the U.S. national team assembled for the 1967 Pan American Games in Winnipeg, Canada, where he won a bronze medal in the men's 1,500-meter freestyle with a time of 17:03.43. After the Olympics, he was a gold medalist in the men's 400-meter freestyle, 1,500-meter freestyle, and 4x200-meter freestyle relay at the 1970 World University Games held in Turin, Italy.
Strenk has lectured and written on the impact of international sports on politics and international relations. He served as the historian of the Los Angeles Olympic Organizing Committee for the 1984 Summer Olympics. He now works as an international business and development consultant and is a principal in Strategic Planning Concepts International.