Justin Mandelbaum Justin Mandelbaum is a Principal at Mandelbaum Properties, a family-owned real estate development and investment firm. He is spearheading the firm’s signature mixed-use development, The Fifth, which includes a 40-story tower with 208 luxury apartments, a 131-key 21c Museum Hotel and an eight screen all-recliner dine-in movie theater. Justin is also the Founder and President of Mainframe Studios, a 501(c)(3) nonprofit arts organization whose mission is to create permanent affordable workspace for artists of all disciplines. The nonprofit is currently renovating a 150,000 square foot building into 180 artist studios, which is slated to become the largest nonprofit artist workspace building in the country. Justin is a native of Greater Des Moines (DSM) and spent 10 years living in New York, Tokyo and Philadelphia before returning in 2008. He was a co-founder of Vespera Investments, a real estate development firm that focused on socially and environmentally conscious community developments in the Northeast, and held positions at real estate private equity funds of Starwood Capital Group and Goldman Sachs. He earned BS and BA degrees with concentrations in real estate and finance from the Wharton School at the University of Pennsylvania through the Huntsman Program in International Studies and Business.