BISMARCK, N.D., Aug. 15, 2024 /PRNewswire/ -- MDU Resources Group, Inc. (NYSE: MDU) announced today that Michael S. Della Rocca and Marian M. Durkin have been appointed to the company's board of directors. Della Rocca, during his 35-year career, held a number of executive positions within the engineering and construction industry, including as chief executive, Americas, of AECOM. He also was a partner in consulting firm McKinsey & Company, where he provided clients with strategic counsel on capital projects ...