In all, Poberezny has logged more than 30,000 hours of flight time over more than 70 years of flying. He has piloted nearly 500 different types of aircraft, including more than 170 amateur-built airplanes. He has also designed and built more than 15 different airplanes. Poberezny toured the U.S. and other nations on behalf of EAA, spreading a "grass roots" aviation message far and wide. He made frequent trips to Washington, D.C., to speak to Congressional leaders and federal aviation authorities, where he defended the rights of amateur aircraft builders and sport aviation enthusiasts while earning his livelihood as a military pilot and aircraft maintenance officer. 

Poberezny was considered one of aviation's leading spokesmen in the United States and around the world, representing the interests of more than 170,000 active EAA members at local, national and international events. In March 2009, Poberezny resigned and the Board voted to his son, Tom to Chairman of the Board. In 2010, it was announced that Rod Hightower would succeed Tom Poberezny as President of the organization. However, a year and a half later Hightower resigned and former Cessna Chairman, President and CEO Jack J. Pelton was elected Chairman.