KEITH A. ALLMAN is the manager of analytics and modeling at Pearl Street Capital Group. He is also the founder of Enstruct, a quantitative finance training and consulting company. Prior to this, he was a vice president in the Global Special Situations Group at Citigroup. Allman has also worked in Citigroup's Global Securitized Markets division modeling conduit transactions and in MBIA Corporation's Quantitative Analytics group. He is the author of the Wiley titles Modeling Structured Finance Cash Flows with Microsoft Excel and Reverse Engineering Deals on Wall Street with Microsoft Excel. Allman received a master's degree in international affairs with a concentration in finance and banking from Columbia University and dual bachelor degrees from UCLA.