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Blake DeFoor


Blake DeFoor


Blake is a native of Chattanooga and graduated from the University of Tennessee at Chattanooga. He has always had a heart for helping people in need, and upon graduation in 2005, his passion led him to a local organization doing child and adolescent mental health case management. In August 2006, Blake first joined the Focus Team as a member of the admissions department, and then quickly moved into a leadership role serving as the Director of Admission in 2010, Executive Director in 2011, and then into the role of of CEO in 2013.

Blake has a deep passion for both patients and staff, and works to promote the importance of healthy relationships in his personal and professional life.

Jennifer Massengale


Jennifer Massengale, RN

Executive Director

Jennifer Massengale serves as the Executive Director at Focus Treatment Centers. Jennifer has been with Focus for nearly 14 years. With a nursing background, she has supported Focus through many roles over the years - Staffing Coordinator, Nurse Executive, Director of Nursing, and now Executive Director. With a calm approach, unwavering compassion, and a sharp mind, Jennifer supervises the medical, clinical, and administrative teams to ensure the highest quality of care throughout the facility.

Mark Peterson


Dr. Mark Peterson

Medical Director

Dr. Peterson is a 1974 graduate of Northwestern University Medical School. He is a member of the American Society of Addiction Medicine. He is Board Certified in both Psychiatry and Addiction Medicine and has over 30 years of experience in the field of Psychiatry/Addiction and Eating Disorders.

Dr. Peterson served as the Chief of Psychiatric Services at the Naval Regional Medical Center in Yokosuka, Japan, and has held several Medical Director positions in the past. He has worked in the community mental health setting and in private practice and has gained a wealth of knowledge while doing this work. As a past recipient of the American Board of Psychiatry and Neurology Physician’s Recognition Award, Dr. Peterson has presented many presentations and authored publications in Psychiatry and Pharmacotherapy. Dr. Peterson has served in this position since the opening of the Center for Eating Disorders. Dr. Peterson enjoys traveling and has visited all seven continents. He is an avid reader, who enjoys time with his family and pets.

Gail Gnade


Dr. Gail Gnade

Senior Clinical Consultant

Dr. Gail Gnade has been a Clinical Psychologist in the state of Tennessee since 1993. She graduated with a Ph.D. in Clinical Psychology and a Master’s Degree in Theology from Fuller Theological Seminary, the largest multi-denominational Seminary in the world. Early in her Career Dr. Gnade was a Certified Chemical Dependency Counselor in the Chicago area and in Pasadena, CA when she was pursuing her PhD.  Dr. Gnade has been with Focus Treatment Centers in various capacities for over 10 years.

 Dr. Gnade’s specialties include:  Addictions, Eating Disorders, Anxiety, Obsessive Compulsive Disorder, Mood Disorders, Relationship Difficulties, Personality Disorders, and Recovery from Childhood and Adult Traumas (utilizing Somatic and Attachment Focused Eye Movement Desensitization Reprocessing, S.A.F.E.).

Dr. Gnade’s passion resides in integrating evidenced based treatment modalities in treatment and the recovery process through the lens of Interpersonal Neurobiology, Poly-vagal Theory (Social Engagement Theory) and Spirituality, with a strong emphasis on the mind-body connection and integration.  In other words, she believes that we have been created to trust and connect with one another as human beings and when this goes awry for various reasons we may cope in a myriad of ways (including substance abuse, eating disorders and other addictions).  Dr. Gnade has found in her own healing process and in witnessing others, that it is indeed true; learning to safely connect with others, oneself and a power greater than oneself is foundational for recovery and living a purposeful and meaningful life.  

During her free time, Dr. Gnade enjoys spending time with family/friends, daughter, two granddaughters, reading and learning, finding humor in everyday life, and spending time with her pet/friend, “Bo,” a Collie who is trained as a HABIT Volunteer (Human Animal Bonding in Tennessee). You can often find the two of them visiting local nursing and rehab facilities (including Focus!).

Chris Harris


Dr. Chris Harris

Director Of Operations & Clinical Services

Dr. Chris Harris has a PhD in clinical counseling from Trevecca Nazarene University.  He is a licensed professional counselor with the mental health service designation.  Dr. Harris has been in the field for over 10 years and has worked in all levels of care inpatient/residential, outpatient individual and intensive outpatient group therapy. Dr. Harris’s research consisted of vicarious trauma in clinicians working with trauma victims.  He believes in treating the whole person and that mind, body and spirit are all connected.  He also has specialized training in treating trauma and PTSD. Dr. Harris, a native of Chattanooga, enjoys spending time with his family and being outdoors.

Julie Munson-Jackson


Dr. Julie Munson-Jackson

Addiction Medical Specialist

Dr. Munson- Jackson is Board Certified in Family Medicine and Addiction Medicine. She is a member of the American Academy of Family Physicians and the American Society of Addiction Medicine.

She is graduate of the James H. Quillen College of Medicine and completed her residency in Family Medicine at UT Family Practice/ Erlanger Hospital in Chattanooga, TN. She has worked in private practice as a family physician for several years and is currently Medical Director for the City of Chattanooga’s Well Advantage Health Center. She joined the team at Focus in 2014 and has been able to utilize her broad medical experience to help manage patients with complex medical diagnoses as they are going through treatment.

She enjoys spending time with her family and friends, reading, hiking, kayaking, running and attending concerts.

Preston Goforth


Preston Goforth, LPC-MHSP

Director Of Admissions

Preston is a Licensed Professional Counselor with Mental Health Service Provider Designation and has worked in mental health since 2003.  He graduated with a BS Degree in Industrial Engineering and has a Master’s of Science degree in Counseling Psychology from Lee University.  He has worked in multiple settings including inpatient acute detox, inpatient mental health, and provided outpatient individual/group counseling services to children and adults.  Preston believes in people and their amazing ability to change seeing it over years of working with hurting clients.  Preston, a native of Atlanta Ga, enjoys spending time with his family, trail running, and the outdoors.