What it’s like to change careers when you’re at the top of your game

When Kim Foster was 17, she decided she was going to become a doctor. It was a feat that no one in her family had accomplished. “I just strapped in and did what I needed to do to execute on that big goal,” she says. Foster worked toward getting into medical school, graduating, and all the subsequent training. Then she practiced medicine for 20 years. “It was great for a while,” she says, “until it wasn’t anymore.” During the last few years as a family doctor, Foster noticed a pattern. Sh...