Outfitted in a brown pant suit and boots, Rosemary Turner’s first job on her first day out of college was as a UPS delivery driver.

Now 38 years later, Turner is the president of UPS operations in Northern California, where she manages more than 16,000 people — many of them delivery drivers — and oversees $1.5 billion in business on a daily basis. A devoted and driven employee, Turner started climbing the ranks at UPS shortly after her first day, moving seven different times across the country…