Our Team

The Center for Behavioral & Nutritional Health is staffed with experienced specialists working together to help people improve their health.

Our team collaborates with physicians in other departments, including Weight Loss (Bariatric) Surgery, The Sleep Center and Heart & Vascular. Our staff is also a resource for primary care physicians seeking ways to help patients better manage medical issues related to behavioral health, nutrition and diabetes.

Team members include:

Joshua I. Hrabosky, PsyD, clinical psychologist manager. Dr. Hrabosky’s clinical specialty is weight management and issues related to bariatric surgery, body image and self-esteem. His additional areas of interest and expertise are in cognitive-behavioral therapy, depression and anxiety.

He received his BA in psychology from Quinnipiac University and his PsyD in clinical psychology from the Virginia Consortium Program in clinical psychology. Dr. Hrabosky completed a three-year fellowship at Yale University School of Medicine before joining the staff of Rhode Island Hospital in Providence, RI where he specialized in pre- and post-bariatric surgery weight-loss counseling. Dr. Hrabosky has published many peer-reviewed articles and presented at numerous scientific conferences on topics including body image, eating disorders, bariatric surgery, and obesity.

Richard Becker, MS.Ed, RCEP, CDE, certified diabetes educator and exercise physiologist. A registered clinical exercise physiologist and certified diabetes educator, he is the coordinator of the Diabetes Self-Management Program at the Center for Behavioral and Nutritional Health. Richard specializes in providing practical diabetic education in topics such as self-care, medications, diet, exercise, and micro/macrovascular diseases.

Richard received his undergraduate degree in exercise physiology research from Cortland State University, and his master's of science in education from Queens College in exercise physiology/cardiac rehabilitation. He is also the coordinator of care for the Pulmonary Rehabilitation Program at Greenwich Hospital. He has lectured locally at universities, public schools, corporations, hospitals, and has been heard on public radio during medical spotlight shows.

Erica Christ, RD, CDE, registered dietitian and certified diabetes educator. A registered dietitian and certified diabetes educator at Greenwich Hospital, Erica focuses on weight management, sports nutrition, and lipid management through behavior modification. She has advanced certification as a health and fitness instructor from the American College of Sports Medicine and is a spin and pilates instructor.

Erica earned her bachelor's degree in communications from Boston University and her dual master's in science degree in applied physiology and nutrition at Teachers College, Columbia University, where she also completed her dietetic internship. Erica received her certificates of training in adult and adolescent weight management from the American Dietetic Association.

Alexandra Conway, PhD, clinical psychologist. Dr. Conway specializes in chronic pain, migraine and headache disorders, stress management, weight management, anxiety and managing chronic medical conditions. She uses cognitive-behavioral and mindfulness-based treatments to help improve well-being and quality of life. 

Dr. Conway received her BS in psychology from Northeastern University and went on to obtain her PhD in clinical psychology with an emphasis in health psychology from the Ferkauf Graduate School of Psychology. She completed her doctoral residency at the Bruce W. Carter VA Medical Center and completed her postdoctoral fellowship in clinical health psychology at VA Connecticut Healthcare system. At VA Connecticut, she focused on integration of mental health care in the primary care setting and pain psychology as well as complementary and integrative approaches to pain management. Her other areas of interest include diabetes, insomnia, women’s health, medical trauma and mind-body medicine.  

Jennifer Denkin, PhD, clinical psychologist. Dr. Denkin is a trained health psychologist with specialties in behavioral medicine and management of chronic medical conditions, weight management, emotional eating and bariatric surgery. Her additional areas of expertise include anxiety, self-esteem and women's issues.

She received her BA in psychology from the University of Minnesota and her PhD from the Pacific Graduate School of Psychology in Palo Alto, CA. Dr. Denkin completed her postdoctoral residency at Kaiser Permanente in Sacramento, CA, staying on as a staff psychologist, where she specialized in behavioral medicine and pre-surgical evaluations for bariatric surgery. In her clinical practice, Dr. Denkin focuses on the mind-body connection and improving overall wellness by increasing coping skills and modifying maladaptive thoughts and behaviors.

Mary E. Motwani, PhD, psychologist. Dr. Motwani is a licensed psychologist with specialty training in areas of behavioral medicine, including diabetes and weight management, behavioral cardiology, lifestyle adjustment to chronic medical conditions, bariatric surgery, organ transplant and chronic pain. 

She received her BA in psychology from the University of Texas and her PhD in counseling psychology from Purdue University. She completed her postdoctoral fellowship in clinical psychology at the Northport Veterans Affairs Medical Center in Northport, NY where she specialized in primary care mental health integration, chronic pain, diabetes and weight management, and women's issues. Her additional areas of interest and expertise include depression and anxiety disorders, attachment and interpersonal concerns, trauma-based disorders, cultural and spiritual diversity issues, and mindfulness-based approaches.

Diane Powis, PhD, clinical psychologist. Dr. Powis is a trained rehabilitation psychologist with specialties in behavioral medicine including stroke, mild traumatic brain injury (MTBI)/concussion, cancer and management of chronic medical conditions.

Other areas of expertise include depression, anxiety, chronic pain and cognitive impairment. She received her BA in psychology from Colgate University and her PhD from Fairleigh Dickinson University in Teaneck, NJ. She completed her doctoral internship at New York University Medical Center – Rusk Institute of Rehabilitation Medicine and her postdoctoral fellowship in neuropsychology and rehabilitation psychology at Mount Sinai Medical Center. Following her postdoctoral training, Dr. Powis was a rehabilitation psychologist and neuropsychologist in Stamford Hospital's department of rehabilitation medicine. After four years of conducting neuropsychological testing and treatment for brain injured patients, she was promoted to senior rehabilitation psychologist and spent the next twelve years assessing and treating patients presenting with brain injury and a variety of other chronic medical conditions.

Nancy Ryan, RD, CDE, BC-ADM, inpatient diabetes coordinator, registered dietitian, certified diabetes educator. Board-certified in advanced diabetes management, Nancy provides diabetes self-management education along with support and prevention information for those at risk of developing diabetes. A certified insulin pump trainer, Nancy conducts Greenwich Hospital’s diabetes support group (see Calendar, search “diabetes”).

She received her undergraduate and graduate degrees in nutritional science from the University of Connecticut. Following a dietetic internship at Yale New Haven Hospital, she worked as research dietitian at Yale New Haven Hospital Clinical Research Center. She has been a consultant for numerous departments of health in Fairfield County, designing and teaching community-based health and wellness programs. At Greenwich Hospital, she has coordinated inpatient diabetes education, coordinated professional staff diabetes education, managed the point-of-care glucose meter program and spearheaded efforts to achieve American Diabetes Association Education Program recognition for Greenwich Hospital and the Center for Behavioral and Nutritional Health.