Mariah Hoover set out to be a chemical engineer because she wanted her work to make a difference in people’s lives. In her short career, Mariah has done a lot. After her bachelor’s, she worked on air fresheners in England. The appeal? “Consumer products have a quick turnaround. You can work on something, and see it in the grocery store 6 months later,” she says. Next, she helped clean up a chemical weapons site in Washington, D.C., work that really drew upon her training as a chemical engineer. “We had to figure out how to find the weapons in the ground, and to calculate exposure risks dermally, from inhalation, and long-term,” she says. “It was really exciting.”

During her Master’s degree, Mariah worked at Novartis in San Francisco, her first foray into pharmaceuticals despite her emphasis on biology as an undergrad, as well as at Cabot, a chemical company. Her next step? “I’m working for Shell Oil,” she says. “I’ll be working on introducing new technologies into refineries across North America. I can’t wait to get started.”