He, along with his wife Heidi, is one of the founding owners of Yellen & Associates, Psychological and Educational Services, a private practice group with two offices in Southern California. Dr. Yellen lectures nationally and internationally on various topics including behavioral management, learning disabilities, sports psychology, and relationships. He is also the creator of Love Shopping List, a relationship app, and the author of the book by the same name ( www.loveshoppinglist.com ). His other books include: The Art of Perfect Parenting and Other Absurd Ideas; Social Facilitation in Action; and Understanding the Learning Disabled Athlete. He is one of the few psychologists that has a Certificate of Proficiency in Chemical Dependency from the American Psychological Association.