After years of uncertainty, he found focus in accounting. Dean Senior was an engineer when he was diagnosed with multiple sclerosis (MS). It was a shock; he had no idea what it was. “I did the worst thing you can ever do when you get told you have an illness: I went online and looked it up. Within three pages of searching, you decide you’re dead,” he says. MS is a condition that affects the nervous system, causing physical and mental symptoms such as fatigue, dizziness, spasms and memory loss.