Abdiel Marin, 38

You could never say Abdiel Marin lacks hustle. Like the time he started his own computer-support company, when he was a teenager in Miami. He was working at a big-box store, and a customer offered to pay him to install a modem. “I saw a million opportunities after that,” he says.

He came to Southwest Florida for college, but stepped away from that to manage IT for a medical billing company. When that company ran into some trouble, Marin started his own medical billing firm. That led him to his current endeavor: creating electronic medical record software for ophthalmology practices.