Olive Dennis (1885-1957)

Dennis went to work for the Baltimore & Ohio Railroad (B&O) to design bridges. As her talent quickly became apparent, she progressed to a new position: “Engineer of Service.” Dennis was tasked with improving passenger experience. During her time with B&O, Dennis introduced many of the comforts we take for granted today: partially-reclining seats, passenger-controlled window sashes, air conditioned coaches, stain resistant upholstery, dimming ceiling lights and more.