Max Nussenbaum, 26, of Detroit is CEO of Castle. Max moved to the city through a program called Venture for America, which aims to place talented recent college graduates in struggling cities throughout the country, with a goal of revitalizing these areas through entrepreneurship. When his fellowship program ended, he decided to stay in Detroit and bought a house in the New Center area. He found investors and put together a team to renovate it. Now, the house is used for other Venture for America fellows to stay in during their time in Detroit. He realized how outdated the standard rental system is and co-founded his company to better utilize technology in the home rental industry. He now has more than 40 people working at his company.