As president of Caterpillar’s Resource Industries Group, Denise Johnson SM ’17 leads the mining and materials hauling business of the world’s largest heavy equipment maker. Even in the best of times, it’s a demanding job, requiring equal measures of manufacturing and management acumen. A recent market downturn has made it even tougher. Since Johnson took the helm of the group in 2016, lower commodity prices have squeezed mining firms’ profits and reduced their demand for equipment. Johnson has ably steered Resource Industries through these lean times, aligning its cost structure…