Dr. Keller is a Diplomat in Clinical Psychology with special interest in counseling and psychotherapy with adults, children, teenagers, couples, and families. He also provides consultation to organizations. Dr. Keller completed his undergraduate training at Temple University, his masters from Columbia University. His Doctorate is from Rutgers University. His internship was at the Rutgers Counseling Center. He is on the Staff of Scottsdale Healthcare, John C. Lincoln, and Paradise Valley Hospital. Dr. Keller was awarded Diplomats from the American Academy of Counseling and Psychotherapy, The American Academy of Behavioral Medicine, and the American Board of Sexology.
He is listed in the National Register of Health Service Providers in psychology, and is a fellow of The American Academy of Clinical Psychology.

Dr. Keller believes that the relationship between therapist and patient is the most important ingredient for change to occur. "