M Mathematics University Colorado, 1996.
He wrote an online puzzle column called Ed Pegg Jr.'s Math Games for the Mathematical Association of America during the years 2003-2007. His puzzles have also been used by Will Shortz on the puzzle segment of NPR's Weekend Edition Sunday. In 2000, he left NORAD to join Wolfram Research, where he collaborated on A New Kind of Science (NKS).
In 2004 he started assisting Eric W. Weisstein at Wolfram MathWorld. He has made contributions to several hundred MathWorld articles. He was one of the chief consultants for Numb3rs.