Idaho's Biggest Employers? Take a Guess. BOISE IDAHO (idaho) - For years whenever a news story mentioned Micron, the company's name was always prefaced with the phrase "Idaho's largest private employer." Thanks to recent layoffs, those days are gone. Micron is no longer Idaho's largest private employer. They're not even second. So who is in the two top spots? The answers may surprise you. That's what Boise State Radio's Adam Cotterell found when he told people who the biggest private employers in Idaho are. © Copyright 2009, idaho