Dan Stefanica has been the Director of the Financial Engineering MS Program at Baruch College, City University of New York, since its inception in 2002, and is the author of the best-selling ``A Primer For The Mathematics Of Financial Engineering" and ``A Linear Algebra Primer for Financial Engineering: Covariance Matrices, Eigenvectors, OLS, and more", and co-author of ``150 Most Frequently Asked Questions on Quant Interviews". He teaches graduate courses on numerical methods for financial engineering, as well as pre-program courses on advanced calculus and numerical linear algebra with financial applications. His research spans numerical analysis, graph theory, and geophysical fluid dynamics. He has a PhD in mathematics from New York University and taught previously at the Massachusetts Institute of Technology. Dan was a silver medalist at the International Mathematics Olympiad, and coached the MIT and NYU teams for the William Lowell Putnam math competition.