Dr. Mark McKee, Licensed Clinical Psychologist

Following his discharge from the United States Marine Corps, Dr. McKee received his Bachelor of Science Degree in Psychology (B.S.) and Master of Education Degree in Counseling Psychology (M.Ed.) from North Texas State University, and his Doctoral Degree in Clinical Psychology (Psy.D.) from the Illinois School of Professional Psychology-Chicago (now Argosy University).

He was on the faculty there for 17 years, teaching a variety of graduate courses including Infant, Child and Adolescent Development, Psychopathology and Psychotherapy.  He also served as Clinical Research Project Chair and Member for over 40 projects. He has been on the Allied Medical Staff of Linden Oaks at Edward Hospital (Naperville, IL) since 1991 and developed the post-doctorate Child and Adolescent Fellowship Program which he directed until 2006.

Dr. McKee is on the Medical Advisory Committee of Naperville, IL School District 203, and a Diplomate with the American Board of Psychological Specialties in Child Psychology under the American College of Forensic Examiners.  He is also a member of the APA, Council for National Registry of Health Service Providers in Psychology, and a Life Member of The National Registry of Who’s Who–2000 Edition.

Dr. McKee is married and has a daughter and son in college.  He enjoys running, gourmet cooking and spending time with his family.

Dr. Jennifer Duff, Licensed Clinical Psychologist

Jennifer DuffDr. Duff earned her Bachelor of Arts Degree from Randolph Macon College, a private institution located in Ashland, Virginia. While attending Randolph Macon, she received several academic scholoarships including the Ineg Wills Wilkins Scholarship, the Distinguished Achievement Scholarship, and the Academic Dean’s Scholarship. In addition, she served as Vice President for the institution’s Psi Chi Honorary Psychology Fraternity.

Dr. Duff graduated from Randolph Macon, Cum Laude with a major in Psychology and a minor in Sociology. At the time of her graduation, Dr. Duff was made a member of Phi Beta Kappa in recognition of high attainments in liberal scholarship.

Dr. Duff earned her Master of Arts as well as her Doctoral Degree in Clinical Psychology, with a specialized track of study in the field of Child/Adolescent Psychology, at the Chicago School of Professional Psychology. Her predoctoral internship was completed through the consortium program at Butler University Counseling & Consultation Center and BehaviorCorp, a community mental health center. Her dissertation is titled, “Anorexia Nervosa from a Psychodynamic Perspective: A Theoretical Overview”.

Dr. Duff completed her postdoctoral internship at Linden Oaks at Edward Hospital in Naperville, Illlinois. While at Linden Oaks, she worked with children and adolescents on the inpatient unit. She completed psychological evaluations with individual patients, provided group therapy, and engaged in program development.

Now in private practice, Dr. Duff has been with M. Mark McKee, Psy.D. & Associates since 2004. She specializes in the psychological treatment of children, adolescents, young adults, and families and works with a wide range of diagnostic concerns including depression, anxiety, attention deficits, and adjustment. She works with issues relating to behavior management, self-esteem, perfectionism, loss and grieving, relationships, and divorce. She also specializes in comprehensive psychological evaluations including assessments for cognitive, intellectual, and emotional functioning, as well as Attention Deficit Hyperactivity Disorder, and Learning Disabilities.

Dr. Duff enjoys being active and runs daily. She and her husband spend the free time they have with their young son, born in 2008.