Our Staff

Daniel Brenner MD | Cambridge Biotherapies
Daniel A. Brenner, M.D.
Medical Director
Dr. Brenner attended Harvard University and Tufts Medical School. He completed his residency in Psychiatry at Cambridge Hospital and was Board Certified in Psychiatry and Neurology. Dr. Brenner has been in private practice in Cambridge for over 20 years.
Heather Thompson-Brenner PhD | Cambridge Biotherapies
Heather Thompson-Brenner, Ph.D.
Clinic Supervisor
Dr. Thompson-Brenner attended Harvard University and the University of Michigan. She is a clinical psychologist providing psychotherapy and research consulting in private practice. Dr. Thompson-Brenner is the author of over 50 peer-reviewed papers and was named a Fellow of the Academy of Eating Disorders.
Olga Pavleyeva, R.N.
Head Nurse
Olga is a member of the IV Access Team at Massachusetts General Hospital. She has worked in a wide range of medical settings, including surgical intensive care, and is certified in Advanced Cardiac Life Support.
Edward Almeida, R.N.
Staff Nurse
Edward is a member of the IV Access Team at Massachusetts General Hospital. He has worked in numerous medical settings, including outpatient and intensive care. Edward is certified in Advanced Cardiac Life Support.
Anne Woodbury, R.N., C.C.R.N
Staff Nurse
Anne has been a member of the Surgical/Trauma Intensive Care Unit, PACU, and Interventional Cardiovascular Team at Beth Israel Deaconess Medical Center. She is a board certified Critical Care Registered Nurse, and is also certified in Advanced Cardiac and Pediatric Life Support.
Emily Monich
Clinical Coordinator & Practice Manager
Emily earned her Bachelor's degree in Leadership Studies from the University of Richmond. She previously worked as an educator both abroad and in the United States.
Daniel T. Thompson
Managing Director of Cambridge TMS

Daniel attended the University of Massachusetts and has experience in mental health services, marketing, and delivery. He is a trained TMS technician.
Ximena Sanchez-Samper, M.D.
Staff Psychiatrist

Dr. Sanchez-Samper is a board-certified addictions psychiatrist, who obtained her degree at the Mayo Clinic in Rochester, MN and completed her addictions fellowship through the combined Massachusetts General Hospital/Brigham and Women's/McLean Hospital Addictions Fellowship Program in 2004. Since then, she has worked with adolescents and young adults with substance use disorders at Children's Hospital in Boston and McLean Hospital. She is currently the medical director of Spring Hill Recovery Center, senior advisor of clinical services for the O'Connor Professional Group, and an instructor at Harvard Medical School.
Francis Guerriero, L.I.C.S.W.
Staff Social Worker
Francis is a graduate of Lesley University and Boston College, in both Social Work and Theology and Ministry, and is among the first graduates of The Ketamine Training Center in California. Having trained and practiced at McLean Hospital, he is steeped in contemporary evidence-based therapeutic modalities, and is deeply informed by twenty five years of experience in Eastern and Western contemplative and meditative practices. He is in private practice in Cambridge and currently involved in FDA-approved breakthrough psychotherapy research for the treatment of Post-traumatic stress.
Laura Warren, M.D.
Staff Psychiatrist
Dr. Warren attended the University of Pittsburgh Medical School, and completed residency at Cambridge Health Alliance. She is board-certified in Psychiatry and Neurology, and has worked with adults in a variety of outpatient settings over the past 10 years. She has special expertise in mindfulness-based treatment and is a Part-Time Instructor at Harvard Medical School.
Shobhik Chakraborty, B.A.  TMS Clinician & Practice Coordinator
Shobhik Chakraborty, B.A.
TMS Clinician & Practice Coordinator
Shobhik is a graduate of Brandeis University, where he studied neuroscience. He has participated in Parkinson’s Disease research at the VA, and basic neuroscience research at Griffith Lab. He is a trained TMS clinician.
Arnie Horowitz, L.I.C.S.W Staff Social Worker & Clinical Coordinator
Arnie Horowitz, L.I.C.S.W
Staff Social Worker & Clinical Coordinator
Arnie is a highly experienced clinician who has worked in a broad range of settings. He is a graduate of Brandies University, and received his MSW from Washington University. He has served as Clinical Director at Community-Based Flexible Support Program, Supervisor at the Community Rehabilitation and Support Program, and has extensive experience as a dual diagnosis specialist.
Brandy Trombly, R.N.
Brandy Trombly, R.N.
Registered Nurse
Brandy Trombly is a highly-experienced nurse who specializes in infusion therapy. She provides a broad range of at-home infusion therapies, but has worked in acute care settings as well. Before becoming a nurse, Brandy spent 4 years as an active duty medic in the United States Air Force. She is certified in Advanced Cardiac Life Support.
Erin Capone, R.N.
Registered Nurse
Erin Capone is a nurse with extensive experience in emergency room and post-surgical intensive care settings. She spent several yeas working at the level 1 trauma center at Beth Israel Hospital in Boston, and more recently has been providing home-based infusion therapy for pediatric, adult, and geriatric patients. She trained at the University of Texas, Arlington, and is certified in Advanced Cardiac Life Support.
Cambridge Biotherapies

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