Evaporative cooling and heat transfer equipment supplierBaltimore Aircoil Company (BAC), Jessup, Md., said it promotedMichael Swiderskito president, effective September 26, 2011. He succeedsSteve Duerwachter, who retired after serving as president since July  2000.

Swiderski most recently served as managing director for BAC Europe. Officials said he has held several manufacturing and executive posts within the Amsted family of companies (BAC's parent) since 1980.

“I am looking forward to carrying out the vision and advancing the global corporate strategy of BAC by continuing to provide the highest quality products through an ultimate customer experience," said Swiderski.

Innovative Processing Solutions, Aurora, Ind., said it promoted 14-year company veteranAaron Potterto engineering manager. Officials say Innovative Processing Solutions, an affiliate of Stedman Machine Company, provides custom solutions for processing systems and specializes in enhancing bulk material-handling systems.