Daniel Ullman currently serves as a Professor of Mathematics and as Associate Dean for Undergraduate Studies for the Columbian College of Arts and Sciences at the George Washington University. His research interests are in the area of graph theory and combinatorics, particularly in the chromatic theory of graphs, combinatorial game theory, and the theory of fractional graph invariants. He has served as lead editor for the Problems Section of the American Mathematical Monthly from 1997 to 2002, D.C. Director of the 2001 International Mathematical Olympiad, and Deputy Leader of the U.S. delegation to the International Mathematical Olympiad in 1991 in Stockholm and 1992 in Moscow.
From 2007--2010, Ullman directed the D.C. Math Circle, a Mathematics enrichment program for 8th Grade D.C. math students. From 2006--2007, he served as a AAAS Science Policy Congressional Fellow, working with the Committee on Science and Technology of the US House of Representatives. From 2001--2006, he chaired the Department of Mathematics at GW.