In 2010, he earned his first career Midget Series victory at Hickory Motor Speedway less than an hour from Mooresville, North Carolina, where he currently resides. The momentum from that victory carried on to other divisions. In the Sprint Car division, he broke the world speed record for a non-winged Sprint Car at Iowa Speedway, winning the pole with an average speed of 146.444 miles per hour. In addition to the speed record, he earned three victories, all on pavement, at O'Reilly Raceway Park at Indianapolis (twice) and Salem Speedway. In the Silver Crown division, he earned his first career series win and first dirt track win in the Hoosier Hundred race at the Indiana State Fairgrounds. During the season Hmiel became the first driver to win the Hoosier Hundred, Rich Vogler Classic, and Pat O'Connor Memorial, the three premier USAC midget-car races, in the same season.