Colette de Marneffe, Ph.D.
Licensed Psychologist
Individual and Couple Psychotherapy







Mindfulness &
Acceptance and


Fees and

Initial Visit

COVID-19 Policies








About Dr. de Marneffe

In almost thirty years of practice, I have worked with persons of all ages who are seeking help for a broad range of reasons. I use different therapeutic approaches, depending on your goals and the challenges that bring you to therapy. Most people seek psychotherapy because they feel unhappy or stuck and wish to change aspects of themselves and their lives. To grow and change, it is important to first take an inventory of how things are now and the factors, both past and present, that have brought you to this point. With greater clarity and awareness of your psychological landscape, we will explore how to take steps toward living in a way that is most true to yourself and your aspirations. I endeavor to build a collaborative therapeutic relationship, founded on trust, curiosity and acceptance, which will enable you to learn about yourself, take steps to grow, and will support you in moving in the direction of deeper meaning, connection, and ease in your life.


The George Washington University, Washington, DC
Ph.D. in Clinical Psychology, February, 1992.

Smith College, Northampton, MA
A.B. in psychology, May, 1982
Magna cum laude and Phi Beta Kappa


Maryland 3390

District of Columbia PSY1848

Pennsylvania PS006369L


I am a certified mindfulness meditation teacher, having completed the Mindfulness Meditation Teacher Certification Program. This two-year program was developed and taught by Jack Kornfield and Tara Brach, through the Awareness Training Institute and developed in partnership with The Greater Good Science Center at University of California, Berkeley.


Private Practice Psychologist (1992-present)

Psychotherapist, The Chesapeake ADHD Center of Maryland, Silver Spring, MD

Adjunct Clinical Supervisor, The George Washington University, (2000-2005). Supervised doctoral students on psychological assessment.

Co-Host, Raising Children Today (2002-2005). Co-hosted monthly radio program about parenting. Topics included: ADHD, sibling rivalry, divorce and blended families, postpartum depression, effective discipline.

Director, Out-Patient Services, The Institute of Pennsylvania Hospital, Philadelphia, PA
(1996-1997). Supervised and oversaw all activities of the Out-Patient Clinic, a training clinic for 18 psychiatric residents and pre-doctoral psychology interns serving 200 outpatients.

Staff Psychologist, The Institute of Pennsylvania Hospital, Philadelphia, PA
(1993-1996). Coordinated treatment and served as primary therapist for psychiatric inpatients on acute care unit. Supervised clinical psychology interns and graduate students in psychotherapy and psychological assessment.

Staff Psychologist, Children’s Choice, Philadelphia, PA (1992-1993). Provided psychotherapy and psychological testing at private foster care agency, treating and evaluating children with behavioral, emotional and cognitive difficulties.


American Psychological Association (APA)

Maryland Psychological Association (MPA)

Mental Health Association of Montgomery County

Association of Practicing Psychologists-Montgomery and Prince Georges Counties

Children and Adults with Attention Deficit/Hyperactivity Disorder







Colette de Marneffe, Ph.D. • ph: 301-891-2120 • e-mail: