Meet Our Clinical Team:


Gatewell Founder/Director, Stacey Rosenfeld, Ph.D., CGP, CEDS

Dr. Rosenfeld is a clinical psychologist licensed to practice in three states: New York (016505), California (PSY 24209), and Florida (PY 9153). Dr. Rosenfeld is an eating disorder and addiction specialist and also focuses on anxiety and mood disorders, fertility challenges, relationship concerns, and sport and exercise psychology. 

In addition to directing Gatewell, Dr. Rosenfeld is a co-occurring (eating disorders and addictions) consultant at Oliver-Pyatt Centers, a comprehensive eating disorder facility in South Miami.

Prior to opening her practice, Dr. Rosenfeld trained and worked at some of the finest institutions across the country. She was a staff psychologist at Columbia University Medical Center in New York and at UCLA Counseling Center in Los Angeles.

Dr. Rosenfeld received her Bachelor of Arts Degree in Psychology from Cornell University. Following this, she earned a Master of Arts Degree in Exercise Science/Sport Psychology from The University of North Carolina at Chapel Hill and her Doctorate of Philosophy in Clinical Psychology from The George Washington University in Washington, DC. She completed a Postdoctoral Fellowship in College Counseling at Pace University in New York.

Dr. Rosenfeld went on to receive specialized training in the areas of group therapy, eating disorders, and dialectical-behavior therapy (DBT). She earned her Certified Group Psychotherapist (CGP) credential through the American Group Psychotherapy Association in 2010. As part of her certification, she attended the weekend training program at The Center for Group Studies in 2008-2010. In 2010, Dr. Rosenfeld completed the Fundamentals of DBT Skills Training through Behavioral Tech. Dr. Rosenfeld attended the Eating Disorders, Compulsions, and Addictions Program through the William Alanson White Institute of Psychiatry, Psychoanalysis, & Psychology in 2010-2011. In 2013, she began training in Family Based Treatment for Anorexia Nervosa through The Training Institute for Child and Adolescent Eating Disorders at Stanford University’s School of Medicine. Dr. Rosenfeld earned her Certified Eating Disorder Specialist (CEDS) credential through the International Association for Eating Disorder Professionals.

Dr. Rosenfeld works with individuals, couples/families, and groups, using an approach that blends cognitive-behavioral (CBT), dialectical-behavioral (DBT), pyschodynamic, and interpersonal techniques, as well as motivational interviewing. She is also able to apply her training in family-based treatment (FBT, also known as the Maudsley Approach) when working with adolescents with eating disorders. The goal of her work is to help clients address their concerns and arrive at a more comfortable and effective place in their lives.

Dr. Rosenfeld has presented at sites and conferences throughout the country, including Cornell Medical Center, Kripalu Center for Yoga & Health, and at the American Group Psychotherapy Association’s annual conference. Her expert opinion is regularly quoted by national media. You can also find Dr. Rosenfeld featured as an “Ask the Expert” columnist on The Fix, a Pro Corner author on Recovery, a Blogger for the National Eating Disorder Association (NEDA), and an editor at Mirror Mirror.

For a more complete list of Dr. Rosenfeld’s affiliations and publications, please see her extended biography.

Clementine Pic

Amy Sosa, Psy.D.

Dr. Sosa is a Clinical Psychologist who provides individual and family therapy to children, adolescents, and adults. Dr. Sosa specializes in the treatment of posttraumatic stress, eating disorders, body image issues, relationship difficulties, grief, and behavioral problems. Dr. Sosa has presented nationally and internationally on the treatment of eating disorders, posttraumatic stress disorder, vicarious trauma, and multicultural psychology and is available for continuing education presentations/workshops. Additionally, Dr. Sosa provides posttraumatic stress evaluations and psychological affidavits in support of asylum cases. Dr. Sosa is passionate about providing informed, insight-oriented supervision and is registered as a Qualified Supervisor for Licensed Mental Health Counselors (LMHC) in the state of Florida.

Dr. Sosa received her Doctorate in Clinical Psychology from the Illinois School of Professional Psychology where she also received her Master of Arts degree in Clinical Psychology.  She obtained her Bachelor of Arts Degree in Psychology from the University of Colorado at Boulder.  She has worked in several clinical settings, including college counseling, community mental health, inpatient psychiatric hospitalization, and residential eating disorder treatment.

Throughout her career, Dr. Sosa received comprehensive training in play, couples, family, individual, and group therapy.  Moreover, she has experience treating complex trauma internationally and completed her dissertation research on Posttraumatic Stress Disorder and Secondary Traumatic Stress among Rwandese healthcare providers. Additionally, she currently provides clinical supervision to counseling psychology practicum students within the Florida Center for Survivors of Torture. Further, she is certified in Trauma-Focused Cognitive Behavioral Therapy. Lastly, Dr. Sosa is chair of the Education Committee for the Miami Chapter of the International Association for Eating Disorder Professionals (IAEDP).  In her free time, she enjoys walking her dog, horseback riding, and going on adventures with her partner.


Thaimi Fina, M.S.Ed., LMHC

Thaimi Fina is a Licensed Mental Health Counselor in the state of Florida. In 2012, she received her Master of Science in Education degree in Mental Health Counseling from the University of Miami. In 2010, she earned her Bachelor of Arts degree in Psychology and French from the University of Southern California. Thaimi is experienced in providing individual, family, and group therapy in English and Spanish. As a Cuban native, she is also particularly attuned to the unique needs of multicultural clients and families.

Thaimi’s therapeutic style is warm, empathic, and authentic. She primarily engages clients from an Interpersonal Process therapeutic approach, examining how issues arising in the therapeutic relationship might parallel struggles in the client’s other relationships and perpetuate their distress. However, Thaimi is skilled at adapting to the unique needs of each client and frequently uses interventions and techniques from Acceptance and Commitment Therapy, Dialectical Behavior Therapy, and Cognitive Behavior Therapy.

In addition to seeing clients in private practice, Thaimi works as a Primary Therapist at Oliver-Pyatt Centers in South Miami. Prior to this, she worked at Counseling and Psychological Services at Florida International University, where she spearheaded the creation of the first eating disorder treatment team on campus. Through these experiences, Thaimi has developed an acumen for treating complex eating disorders and co-occurring conditions in adults. She consistently collaborates with dietitians, physicians, and psychiatrists in the community in order to provide comprehensive care to clients with eating disorders. Additionally, she is actively pursuing the Certified Eating Disorders Specialist credential through the International Association for Eating Disorder Professionals.

Thaimi is also skilled in counseling clients with a trauma history and is in the process of becoming certified in Cognitive Processing Therapy, an evidence-based treatment that consistently demonstrates a significant reduction in PTSD symptoms. Thaimi is also certified in Trauma-Focused Cognitive-Behavioral Therapy.

In addition to these specialty areas, Thaimi has extensive experience counseling clients with body image struggles, difficult family dynamics, depression, anxiety, gender identity issues, sexuality concerns, college-related difficulties, substance misuse, personality disorders, acculturation difficulties, and grief.  Thaimi has a special interest in working with ethnic minority clients, LGBT clients, and women. When Thaimi isn’t working, you can find her on the beach, going on road trips, and spending time with her pets and loved ones.


Christine Tellez, MS, RDN, LD

Christine Tellez, MS, RDN, LD has been practicing as a dietitian since 2012. She obtained her Master’s in Dietetics and Nutrition from Florida International University. After graduation, Christine entered FIU’s accredited internship where she completed her clinical and long-term care rotations at the Miami Veteran’s Affairs Hospital and her food service rotation at Aventura Hospital and Medical Center.

Since becoming a registered dietitian, she has worked at Florida International University providing nutrition counseling and education to students and other community members.  Additionally, she supervises nutrition students in the dietetics and nutrition program that volunteer alongside her.

Christine takes a non-diet approach to nutrition. In 2016, she completed an Intuitive Eating (IE) training with the co-creator of IE, Evelyn Tribole. Christine believes that food should nourish both the body and mind, and enjoys applying her nutrition knowledge to helping others regain a healthy relationship with food.

Her areas of interest and expertise include eating disorders; weight concerns; healthy eating; women’s nutrition; adolescent nutrition; and GI issues, such as IBS and celiac disease. Christine is bilingual (Spanish) and practices comfortably in both languages.

In her spare time, Christine enjoys reading fiction, exercising mindfully, learning to use her new pressure cooker, and spending time with her two children.

For information about employment opportunities at Gatewell, please click here.