Newton Square
Counseling Center

counseling for children, teens, and adults
PH: 508.752.5880
Our Clinicians:

Zamir Nestelbaum, MD., MPH                                        (ext. 10)

President, Newton Square Health Center, P.C.

   Board Certified in Psychiatry
   Fellow, American Psychiatric Association
   Chief, Psychiatric Services at Harrington Memorial Hospital (Southbridge, MA)
   Psychiatric Consultant, Monson Developmental Center
   Independent Medical Examiner, Massachusetts Department of Industrial Accidents
   Associate in Psychiatry, University of Massachusetts Medical School

   MD, University of Massachusetts Medical School
   MPH, University of Michigan
   Internship: George Washington University Medical Center, Washington, D.C.
   Residency: Mt. Sinai Medical Center, New York
   Fellowship: New York State Psychiatric Institute

Dr. Nestelbaum provides psychiatric evaluation and psychopharmocology and treatment for adults, older adults, and adolescents over age 15. Disability and Forensic evaluations are also provided. Dr. Nestelbaum grew up in Worcester and knows the neighborhood quite well. He has been practicing at Newton Square since 1989. Virtually all local insurance plans are accepted.

Appointments can be made or changed through Ginny Maher-Cooper at:

No clinical information or prescription refill requests will be handled through this email address.


Jennifer Barris, MA, LICSW                                               (ext. 27)

Master's Degree in Social Work

Jennifer is a private practitioner and consultant. She received her B.A. at Boston University and Master's of Social Work at The University of New England, Me. She is an experienced clinician of nearly 20 years who is primarily trained in Cognitive Behavioral psychotherapy with an emphasis on depression and anxiety. Further emphasis has been on
adolescents, adults and Employee Assistance Programs, where she is contracted with a variety of company's EAP in order to provide short-term therapy to employees and their families. 


Christopher A. Cimmino, MSW, LICSW, LADC I          (ext. 18)                                         

Licensed Independent Clinical Social Worker                                                                                                                                    Licensed Alcohol and Drug Counselor I                                                                                                                                             Member National Association of Social Workers

Christopher has over twenty-five years of experience in providing services for those suffering from mental health and substance abuse related issues. Over the past twenty years, Christopher has emerged as a highly trusted and reliable therapist, as he continues to offer the highest level and care for his patients.

His focus is cognitive-behavioral therapy, which allows individuals to set attainable goals through planning, pacing, and prioritizing. Consequently, individuals can change negative thought patterns and core beliefs. As  a result, individuals often strengthen their ability to communicate effectively and become better advocates for themselves. Clients will learn to become more empowered, feel more peaceful and strengthen their relationships with others.

Services include one to one therapy, group and family counseling in the comfort of a private setting. Specialties include anxiety, depression, stressful life changes, anger management, self-esteem, men's issues, grief, substance abuse, co-dependency, behavioral addictions, stress management and parenting issues. In addition, he offers psycho-educational and support for parents concerned about their child/teen's use of substances. Most insurance plans are accepted and a sliding fee scale is available for those who chose to self pay.



Mary Johnson, MA, LMHC                                               (ext. 29)

Licensed Mental Health Counselor

Mary is a Master's level therapist who graduated from Assumption College and has over 20 years of counseling experience. She has been licensed as a mental health counselor for 12 years and specializes in the treatment of clients and/or families suffering from the effects of substance abuse. Experience includes individual and group treatment, supervision and training in the area of both mental health and addiction issues.  She has also conducted court evaluations, performed crisis intervention services, and sees clients with chronic mental illness, trauma histories, and dual-diagnosis. Presently she is in private practice and is a provider for most health insurance companies, including HMOs.

Marilyn Lisker, PhD                                                  (ext. 12)

PhD and MA from Southern Illinois University

Massachusetts Licensed Psychologist, since 1980

By working collaboratively with people and listening well to her clients, Marilyn's focus is to have her counseling lead to hope, healing and change. To support her clients to reach that point, she may use one of a variety of approaches such as cognitive therapy, relaxation skills, psycho-education, self-care/wellness strategies, relationship/assertiveness skills, or identification of support systems. She works with adults and has considerable experience seeing people with depression, anxiety, bipolar disorder, schizophrenia, and substance abuse combined with mental health issues. She also likes doing transition work with people feeling distress due to life stressors involving change or loss. She has a special interest in helping people to cope with health and pain problems. Her aim overall is to have people move from distress to coping; to build hope, healing and change; to help people see their strengths even though they may not recognize them at the start of treatment.

My practice in limited to Adults only.

Louisa Knowles, MA, LMHC                       

Licensed Mental Health Counselor
Certified DBT Practitioner
Certified in EMDR

Louisa has trained extensively in the use of mindfulness and psychotherapy. She has completed an internship at Jon Kabat-Zinn's "Mindfulness Based Stress Management Program" at UMass Medical Center. She has found that Mindfulness combined with psychotherapy to be an effective path to move beyond our negative self-concepts and fears, and to gradually experience our essential wholeness. She is also trained in cognitive and behavior therapy . For sexual abuse and other trauma work, she is a certified practitioner of
DBT (dialectical behavior therapy) and EMDR . She provides treatment for anxiety disorders, depression, grief/loss for both children and adults. She also works with clients moving through life transitions, coping with physical illness and with women's issues. She provides treatment to children, adults, couples, and families. Prior to becoming a counselor, Louisa taught Hatha Yoga, meditation, stress management, and was a pre-school teacher.


Stuart S. Moskowitz, MA, LMHC, LMFT
(X 16)

Master of Arts in Counseling Psychology, Anna Maria College, Paxton, MA

MA, Licensed Mental Health Counselor
MA, Licensed Marriage and Family Therapist
Member: American Marriage and Family Therapists Association 
Certified Mental Health Counselor through the National Certified Counselors Association

Stu has over 38 years of counseling experience in outpatient and in-patient settings. He has been associated with Newton Square Counseling Center for the past 15 years.

Stu provides individual, couples and family therapy. Stu has extensive experience in the treatment of all mood disorders such as Anxiety, Panic Disorder and Depression. He is skilled in the treatment of substance abuse and behavioral addictions. He is also experienced in the treatment of disorders associated with stress, anger, co-dependency and life transitions. 

He is on all major HMOs, Managed Care and Employee Assistance Panels.


Debra Tetreault-Silverberg, MSW, LICSW                              (ext. 17)

Boston College Graduate School of Social Work
Internships: Massachusetts General Hospital
                   North Shore Catholic Charities

She provides adult psychotherapy for individuals and couples combining psychodynamic training with active cognitive interventions. She has extensive experience working with individuals with major mental illnesses providing both long term therapy and emergency evaluations. Her focus in private practice is on the treatment of mood and anxiety disorders as well as survivors of childhood abuse. She also provides treatment for situational stressors including separation, loss and bereavement.

Leah Slivko, MSW, LICSW                               

Licensed Social Worker in Massachusetts, New York, and New Jersey
Faculty at : NYU School of Social Work
The NJ Insitute for Training in Psychoanalysis
Eastern Group Psychotherapy Association
Certified Disaster Mental Health Worker for the American Red Cross

She received training at the William Allison White Institute in NYC, the New Jersey Institute for Psychoanalysis, and the New Hope Guild for Training and Research in Mental Health.
She is certified in Psychoanalysis, Group Therapy and Family Therapy. In addition, Ms. Slivko has presented internationally in Israel, Italy, NY, NJ and has edited as well as written for various profession publications.

She provides therapy to children, adolescents and adults in Worcester, Amherst, and NYC. She provides clinical supervision and has provided emotional support and crisis management to those involved in the 9/11 attack in NYC.


Ginny Maher-Cooper                                                (X 19)
Our gracious office manager who may be reached at 508.752.5880 (X 19)

*****   Email contact should not replace therapy sessions nor be of a clinical nature. If you need to schedule or re-schedule an appointment, please call your clinician.  If your need is of a crisis nature, please call our main number for further instructions or call 911. *****