Mario Longhi

Mario Longhi is a Brazilian American businessman who was the CEO of U.S. Steel, based in Pittsburgh, Pennsylvania, US. He was promoted to CEO in September 2013 after the retirement of John P. Surma and after Longhi had completed 15 months as an executive of the corporation. He retired in June 2017 and was succeeded by David Burritt.

Prior to his work at U.S. Steel, Longhi was CEO of Gerdau Ameristeel Corporation from 2006-2011.

A native from Tatuí, Brazil and son of Italian immigrants, he obtained both undergraduate and master's degrees in metallurgical engineering from Instituto Mauá de Tecnologia. After graduating, Longhi worked for Alcoa for 23 years.