CSL Co- Founder and Director of Curriculum
D. Joel Whalen teaches at DePaul University’s Center for Sales Leadership. 20 brilliant DePaul University instructors teach his Effective Business Communication class. Joel has received business and teaching awards. He wrote Professional Communications Toolkit (Sage, 2006) and 4-Second PowerPoint Slides (Spenser & McGee, 2015). He teaches online at Hit-Play.net.