Lincoln Electric Holdings Inc. announced David J. Nangle, executive vice president, president, the Harris Products Group (HPG), will retire in October. Nangle will be succeeded by Gregory Doria. As part of the transition, Doria has been promoted to senior vice president, COO, HPG. Nangle joined Lincoln Electric in 1979 and during his 42-year career with the company held various sales management leadership positions before being named president of HPG. Doria joined Lincoln Electric in 2000 and during his 20-year career with the company has held several leadership positions in sales and marketing.