William McAllister has been a full-time faculty member at St. Joseph's College, NY, for the past 13 years and an adjunct professor at Suffolk County Community College for the past 30 years. He has taught a variety of computer science courses including data structures. For the past eight years, he has served as the Associate Chairperson of the Mathematics and Computer Science Department at St. Joseph's College, and is currently the co-principal investigator on a $500,000 grant from the National Science Foundation aimed at improving the number of skilled computer professionals in the national workforce. Prior to joining St. Joseph's he worked in industry for 27 years, initially as an engineer and then as a computer scientist. His areas of expertise are algorithm development, pedagogy, and curriculum development. He is very active in student programming competitions both on the collegiate and high school levels, and founded and annually conducts an ACM-sanctioned Long Island Regional High School Programming Competition, coaches the St. Joseph's intercollegiate programming team, and conducted the 2007 CCSC Eastern Regional programming competition.