Click here to learn about our treatment programs for teenagers.
For Confidential Help, Call:
(866) 729-1012

Our Team

Colleen Kestel

Colleen Kestel, MBA, RDN, LDN

Director of Operations

Colleen began her clinical journey as a Diet Technician at a Residential Treatment Center (RTC) as she continued her education and earned her clinical licensure as a Registered Dietitian. Colleen then earned her Master’s degree in Business Administration with a concentration in healthcare. With this advanced degree, Colleen led a team of Dietitians as a Director of Nutrition Services for RTC, Partial Hospitalization Program (PHP) and Intensive Outpatient Program (IOP). Colleen then combined her passion for nutrition and operations and was promoted to Assistant Director of Operations. Within this position, Colleen assisted in the development and operations including but not limited to RTC, PHP, and IOP for adults and adolescents. During this time, Colleen supervised and led an extensive team in clinical operations.

Outside of operations, Colleen has experience working individually with patients of all ages and families regarding their relationship with food, body, and overall functioning. Colleen believes addictions do not discriminate; all ages, genders and backgrounds deserve a chance at improving their outlook on life and doing so through gentle nutrition therapy, intense group or individual therapy, and joining a diverse community to no longer feel alone.

In 2022, Colleen co-founded a Joint Commission Accredited IOP and Outpatient Program in Will County as she recognized the need for quality treatment for mental health and eating disorders in the community. Colleen returned to Suncloud Health in 2024 as Director of Operations and is assisting with program growth and development.

Elizabeth E. Sita, MD
Medical Director of Adult Services

Dr. Elizabeth E. Sita, MD, is a Board Certified psychiatrist specializing in the care of patients with eating disorders. She completed her undergraduate training at the University of Chicago and graduated with Highest Honors. She then earned her medical degree at Northwestern University Feinberg School of Medicine and was recognized with the Chairman’s Award for Excellence in Psychiatry. She subsequently completed residency with the Department of Psychiatry and Behavioral Sciences at McGaw Medical Center of Northwestern University, where she was elected Chief Resident and received the Resident Psychiatrist Leadership & Service Award.

Upon completing her training, Dr. Sita came to Ascension Alexian Brothers Behavioral Health Hospital, where she served as Assistant Medical Director of the Center for Eating Disorders and Director of Transcranial Magnetic Stimulation Services before transitioning to lead the new inpatient eating disorder unit as Medical Director of Eating Disorder Services at Ascension Saint Joseph Hospital – Chicago. In these roles, she has cared for a multitude of adolescents and adults struggling with anorexia nervosa, bulimia nervosa, binge eating disorder, and other eating disorders as well as severe, cooccurring mood, trauma, personality, and substance use disorders.

Dr. Sita has been recognized throughout her training and practice for a commitment to excellence in patient care and for her ability to engage patients in their most challenging moments. Her passions include the care of treatment-resistant eating and mood disorders as well as questions of medical capacity and end-of-life decision making.

She believes that, first and foremost, human connection is key to mental health and well-being and strives to share this philosophy in each and every patient encounter. She is excited to bring her expertise to SunCloud Health as the Medical Director of Adult Services!

Lacey Lemke, PsyD
Assistant Vice President of Clinical Services

Dr. Lacey Lemke (she/her) is a licensed clinical health psychologist with specialized expertise in the treatment of eating disorders and the practice of medical and health psychology. She completed her doctoral training in clinical psychology with a Primary Care emphasis at the Adler School of Professional Psychology. Dr. Lemke went on to complete both her predoctoral clinical internship and postdoctoral fellowship through Ascension Health, where she gained advanced training working with individuals experiencing eating disorders and self-injurious behaviors, as well as within pediatric subspecialty settings including endocrinology, neurology, and adolescent medicine.

Dr. Lemke is deeply committed to providing evidence-based, compassionate care and collaborates closely with interdisciplinary teams to ensure comprehensive treatment. Her professional mission is to support patients in achieving their fullest potential by guiding them to the most appropriate level of care and empowering them to make meaningful, sustainable progress toward improved health and well-being.