Our Team

Our team of professionals is dedicated to our mission of fostering long term, healthy changes in the lives of our clients. We draw on diverse backgrounds and experiences to help our clients achieve recovery.


Arden O’Connor founded the O’Connor Professional Group to address the needs of families and individuals struggling with an array of behavioral health issues, including addiction, mental health disorders, eating disorders, learning, and other developmental challenges. With several relatives in recovery, Arden is passionate about helping families and individuals navigate the highly fragmented treatment system in a way that creates positive outcomes and allows families to heal.  Arden is a graduate of Harvard College and Harvard Business School. She remains heavily involved in community activities, as a board member of Winsor School Corporation, Collaboration for Family Flourishing, Massachusetts Association of Mental Health, and C4 Recovery Solutions. Previously, she served as a board member for the Justice Resource Institute (former chair), Harvard Club of Boston, Victory Programs, and Harvard Business School Alumni Association of Boston. She maintains professional affiliations with the following organizations: Attorneys for Family Held Enterprises, Boston Estate Planning Council, Worthy Circles and Family Firm Institute.


Dr. Jonathan Green is OPG’s Chief of Clinical Operations. A native of Massachusetts, he received his PhD in clinical psychology from Clark University in Worcester, MA. Jon completed his clinical internship and postdoctoral fellowship at the VA Boston Healthcare System with appointments at Boston University School of Medicine and Harvard Medical School. Here he completed rotations in dual diagnosis (PTSD/substance use disorders) and behavioral medicine while also conducting research in the National Center for PTSD. Jon has published over 20 peer-reviewed articles and book chapters and has received awards from the American Psychological Association, the Association for Behavioral and Cognitive Therapies, the Anxiety and Depression Association of America, and the Military Suicide Research Consortium. Jon is a founding member of the Suicide and Self-Injury Special Interest Group of the Association for Behavioral and Cognitive Therapies and is current president of the Men’s Mental and Physical Health Special Interest Group. Jon enjoys finding compassionate and creative ways to apply gold-standard, empirically supported treatments for clients with unique needs, valuing the relationship between the client and provider as much as the quality of the intervention.



Andy KangAndy Kang, J.D, LICSW is the Director of Clinical Services at OPG. He is responsible for the supervision, training and management of case managers and sober companions, overseeing the clinical direction of client work. As a member of the leadership team, Andy participates in strategic planning, as well as the gathering and analysis of outcomes measures relating to OPG clients.  Andy is a licensed independent therapist. He completed his clinical training at the Boston College Graduate School of Social Work. Prior to becoming a therapist, Andy was a counselor of a different kind, practicing law for ten years in the areas of complex commercial litigation and employment law in Boston. Andy now treats professionals, addressing the barriers to wellbeing with an aim of de-stigmatizing mental health care and helping individuals, couples and families in need. Andy is also an Adjunct Professor at the Boston College Graduate School of Social Work, teaching courses in Substance Abuse and Diversity.


Jeremy VarnumJeremy Varnum is the Director of Operations at OPG. In this capacity, he helps coordinate the logistics around engagements with families, and designs appropriate service recommendation packages for clients. Additionally, he supervises case managers who are responsible for delivering these services to our clients. With over 5 years of personal experience in recovery, Jeremy’s approach incorporates motivational interviewing, combined with outdoor education, adventure therapy, and mindfulness based stress reduction. Jeremy has a BS in Kinesiology (Outdoor Education) from the University of New Hampshire and is currently pursuing his Master’s in Social Work. When he has free time, Jeremy can be found outdoors rock climbing, snowboarding, and hiking.


Jonathan Paul, OPG’s New York Regional Director, is a licensed social worker in the state of New York. Jonathan graduated Yeshiva University with a Masters in Social Work in 2010. He has since practiced addiction counseling, psychotherapy, and case management in a variety of outpatient chemical dependency programs, mental health centers, and private practice. Jonathan helps individuals, couples and families afflicted with mental health and addictive disorders find solutions to their problems. As a native New Yorker, born and raised in Manhattan, he enjoys taking walks in the city with his golden retriever, running in Central Park and weekend adventures to the country-especially during fall, his favorite season.



Justin Cambria, MSW, MBA, is the Director of Clinical Outreach, and a Clinical Case Manager and Family Coach at OPG. He works with the team to build partnerships across the industry and to present OPG’s work and services at conferences, and to clinicians and practices with whom the company collaborates. He also sees clients and families as a coach, with a particular expertise in substance use disorders. In clinical training, Justin focused on motivational interviewing, harm reduction, acceptance and commitment therapy, and mindfulness. He is a yoga teacher (RYT-200) and has experience in individual and group meditation instruction. Justin identifies as a person in long term recovery from a substance use disorder and is passionate about efforts to end stigma associated with addictive disorders and mental health challenges. Justin earned a dual masters in Clinical Social Work with a Mental Health Concentration, and Masters in Business Administration with a focus on Marketing Innovation at Boston College. He also holds a Bachelors in English from Middlebury College.



Brie Shelly, MS, LMHC, CRC, is OPG’s Director of Client Intake and Outreach. She received her Masters in Clinical Rehabilitation and Mental Health Counseling from the University of North Carolina (UNC), Chapel Hill.  Brie went on to complete research under Dr. Cindy Bulik at The Center of Excellence for Eating Disorders at UNC (CEED). Brie has gained experience working in all levels of care and at various treatment programs including: Veritas Collaborative’s adolescent continuum,  CEED’s inpatient and partial units, Monte Nido’s Eating Disorder Center of Boston’s PHP/IOP unit, and on McLean Hospital’s 3East DBT-focused inpatient and transitional units. She has experience in conducting both individual, family, and group therapeutic sessions, with attention to using Motivational Interviewing, CBT, ACT, and DBT modalities. Brie also loves incorporating animal therapy and the outdoors into sessions. She is committed to providing her clients with the tools and strategies to achieve healthy physical, emotional, and behavioral change.



Alexa Barach, MSW, is a case manager at O’Connor Professional Group. She received her Masters in Clinical Social Work at Boston College School of Social Work. Alexa has experience in conducting individual and family therapy sessions incorporating Motivational Interviewing, Mindfulness, Solution-Focused Therapy, and Cognitive Behavioral Therapy modalities. She completed the Neuroscience in Social Work Certificate and has informed her work with clients through a neuroscience lens. While pursuing her Masters, Alexa interned on the Boston College campus in the Alcohol and Drug Education program working with young adults struggling with substance use and abuse. She also worked on an In-Home Therapy team and at Tufts Medical Center in their Outpatient Psychiatry. Alexa brings compassion and empathy to her client-centered approach and believes that all people have the ability to achieve their goals for change given the right support. Alexa has lived in and around Boston for the majority of her life and in her free time enjoys outdoor activities, cooking, and reading.


photoTanya Beecher, MSW, LICSW is a clinical social worker with over 15 years of experience with adolescents, adults and families. She has worked in multiple settings including therapeutic boarding schools, addiction treatment centers, college counseling offices, and in private practice. Over the years, she served as the clinical director and senior clinician in adolescent and adult programs. Tanya brings clarity, compassion, and a belief that people who are suffering emotionally want a way out, they just often do not know how. She is gifted at reaching through to clients deeply stuck in self-defeating patterns. Tanya thoughtfully guides families in the process to provide on-going education and support to assist healthy family change. Tanya studied Exercise Science as an undergraduate, and holds a Masters Degree in Clinical Social Work from Smith College School for Social Work. She specializes in addictions, dual diagnosis, eating disorders and trauma. Tanya lives in Western Massachusetts where she enjoys many local outdoor pursuits from rock climbing to skiing to road biking.


Maureen Borkowski is a LCSW and Credentialed Alcoholism and Substance Abuse Counselor. She has worked with and for some of the most prestigious treatment facilities in the country. She has expertise in various capacities, including coaching, case management, and relationship dynamics. She takes a collaborative approach with both her clients and other professionals, which optimizes each patient’s treatment outcome by ensuring that all needs are being met through coordination of care and delivery of needed services. She sums up her professional life by saying, “There is no more rewarding work on this earth than watching someone get their life and their dreams back. To play even a small part in helping someone regain hope and dignity is an honor and a privilege that leaves me both humbled and elated. I actually get to witness miracles!”




David CarriganDavid Carrigan is OPG’s Director of Digital Marketing and a Case Manager. He received his Bachelor’s degree in Psychology from the University of New Hampshire in 2012. Since that time, David has worked in a number of capacities within the mental health field. He has spent the last two years as a Senior Recovery Specialist at The Center for Motivation and Change: Berkshires, an inpatient substance abuse rehabilitation facility, and prior to that as a supervisor at a residential program for adolescents with behavioral issues. He specializes in working one on one with individuals to set and achieve their treatment goals and believes in a motivational client centered approach. David is an experienced group facilitator and active in his local community. He is trained in Motivational Interviewing, Cognitive Behavioral Therapy and Dialectical Behavior Therapy. He is a trained SMART Recovery Facilitator and runs a weekly SMART Recovery group in addition to volunteering as a youth mentor. David is currently pursuing his Masters Degree in Social Work at Boston College.



Diana Clark is an OPG consultant. She is the author and facilitator of several workshops specifically designed for family members and the recently released book Addiction Recovery: A Family’s Journey’. Diana offers a calm, compassionate and logical voice during a time of family turmoil. She also works in a supervisory role with OPG’s family coaches, and collaborates extensively with case managers on cases where she provides coaching services to families.  Diana holds a Masters Degree in Counseling Psychology from Antioch University and prior to working in the addiction field, Diana was a practicing labor and employment attorney advising employers about the need for clear, compassionate and enforceable policies.




Randi Coleman

Randi Coleman has been a professional interventionist and consultant for over 15 years. She is an expert in addiction counseling and consulting, which provide a diverse foundation for her work. Randi combines traditional techniques with modalities such as mindfulness and motivational coaching. She believes that connecting with her clients in a meaningful way, such as through active listening, is the key to effectively working with families.  Randi holds a Masters Degree in Psychology from Antioch as well as certifications in both California and Florida as an Addictions Counselor. Randi has been a preferred provider of Continuing Care for The Betty Ford Clinic, Sierra Tucson, The Meadows and Hazelden; Randi has also received advanced training from Terry Gorski, Pia Mellody and Patrick Carnes, PhD., The Meadows and The Betty Ford Center.


screen-shot-2017-08-02-at-6-57-59-pmHallie DeLory is a Certified Drug and Alcohol Counselor, Interventionist, and Recovery Coach for OPG.  She has been a drug and alcohol counselor, case manager, interventionist, and sober companion for 28 years. She discovered personal recovery in her early twenties. Hallie works with a diverse set of clients and is passionate about helping others find their path in sobriety. She takes a client-centered approach to every case, fostering deep connections with her clients and their families, and investing herself fully in their success. As part of this approach, she meets clients at their current level of functioning and helps them to rediscover the joy of living a healthy and happy life. Through her many years of experience in recovery, Hallie models appropriate sober behavior and is a great power of example.



Siobhan Flanagan

Siobhan Flanagan, LICSW, is a Clinical Social Worker who has been providing mental health services to individuals and families in various settings for more than 15 years. Siobhan’s approach is empathic, warm, collaborative, and respectful, and informed by the belief that the individual or family is the true expert on their experience. Siobhan believes strongly in the power of the therapeutic alliance and believes establishing a trusting relationship is imperative to achieving positive change. Her work is guided by these principles and the belief that there is always a possibility to create meaningful change. She continues to be amazed by the incredible strength of families facing adversity, such as having an addicted loved one, and their resilience and ability to heal continues to inspire her. Siobhan enjoys working with all client populations and has had experience working in various treatment settings including inpatient psychiatric, outpatient mental health, and community based assertive community treatment.


Kaitlin Gatti

Kaitlin Gatti serves as the Marketing Associate at O’Connor Professional Group. She provides administrative support to the team and helps with day-to-day operations in the office. Kaitlin holds a Bachelor’s degree from Plymouth State University in Marketing and Professional Communication. Her personal experience with family and friends makes her dedicated and passionate about working in the behavioral health field. In Kaitlin’s free time, she enjoys snowboarding, hiking and spending time with her family.





“GlenGlen Harnish is a case manager at O’Connor Professional Group. He holds a Bachelor of Arts in sociology from Connecticut College and is pursuing education in both coaching and clinical social work. Glen takes a compassionate, client centered approach in his work. He focuses on clients’ adaptive strengths, and believes that “the best way to get rid of weeds is to have a strong garden.” Glen has worked extensively with dual diagnosis individuals struggling with addictions, problems with time management, motivation, procrastination, anger and avoidance issues. He helps clients develop systems, strategies, and tools in order to manage their lives more effectively. Also, models positive interactions and behaviors. His interests include rock climbing, Brazilian Jiu Jitsu, hiking in the white mountains, stacking rocks on the beach, and mountain biking in the woods of the greater Boston area. He leads meditation centered recovery groups in Cambridge, MA. Glen also serves as a volunteer member of the Massachusetts Department of Mental Health Internal Research Board (IRB) which reviews protocols of researchers seeking approval to enroll patients in research projects.


Maegan Kenney is a 2nd year student in the Clinical Psychology PsyD program at William James College in Newton, MA. She is a psychology practicum student at OPG. She has lifelong experience with opioid addiction and is also a person in long-term recovery. As the Founder and Chair of the school’s Opioid Crisis and Advocacy student group, she has organized educational opportunities for students including a naloxone training and panel discussion about opioid use and misuse with the Mark Wahlberg Youth Foundation. Maegan completed her Master’s level training at Monte Nido at Laurel Hill in Medford, MA and Adolescent Consultation Services in Cambridge, MA. She has experience facilitating group therapy and providing meal support for women with eating disorders as well as writing comprehensive psychosocial evaluations for court-involved youth and their families, respectively. Since 2014, Maegan has worked in the Behavioral Health Communications Center at Cambridge Health Alliance and has a master’s degree in Clinical Mental Health Counseling from William James College.

Susan Knee is an OPG Case Manager and recently obtained a Masters Degree in Social Work from Adelphi University in Manhattan with a concentration in Mental Health, Substance Abuse & Trauma. After a successful career in the fashion industry, Susan decided to pursue her passion for helping others. She completed her initial fieldwork hours at AHRC, where she treated individuals diagnosed with Autism Spectrum Disorder, in addition to other behavioral and learning disabilities. Additionally, Susan completed her advanced fieldwork at Montefiore Medical Group, using cognitive behavioral therapy interventions to help people struggling with depression and anxiety. Through OPG, Susan has worked with a range of clients with co-occurring issues, including complex medical issues. She also has extensive experience in helping people recover from substance abuse and eating disorders.


Alex Kurjiaka is a Case Manager for OPG. She is working towards a Masters degree in Clinical Mental health Counseling (to be completed 2019), and has a Bachelor of Arts in Behavioral Science. Alex has a diverse background in crisis intervention and treatment, working in multiple capacities including recovery group leadership and smoking cessation. She has working knowledge of substance abuse, co-occurring disorders, mental health eating disorders and addiction medications. She is well versed in both abstinence-based and harm reduction schools of thought. With a background in child care, Alex has worked with individuals at all stages of development, including children and adolescents. She has familiarity with cognitive and emotional developmental norms for adolescents and adults. Alex believes our journeys are unique and each client must be directed to the best fit for their personal recovery.



William Messinger, JD, LADC, is a Senior Advisor at OPG. Bill’s mission is to improve recovery rates for functional alcoholics and addicts, with an emphasis on beneficiaries and family business members. Shortly after completing treatment in 1995, he learned that doctors and pilots had very successful outcomes in comparison to other groups due to their unique treatment regimes. Bill then initiated the concept of applying their recovery protocols to other groups. He combines legal and addiction expertise to help families, trustees, and professionals address addiction in family members and beneficiaries.

Bill has written extensively on the topic of applying the pilot/physician model to the affluent, including an article on suggested model language to use in trusts to replicate the pilot/physician model. His articles also address the impact of SUDs on family offices and professionals, recovery management, and the treatment needs of the affluent. He is a graduate of Yale College, University of Minnesota Law School, and the Hazelden School of Addiction Studies. His website is www.BillMessinger.com


Christopher O’Connor is the Special Projects Coordinator at O’Connor Professional Group. He manages social media, blog posts, the website, the treatment center directory, and other special projects. Chris’ struggles with addiction were the emotional impetus for the founding of the company. He is open about his colorful background, and uses his personal experience to write about public policy and mental health issues. Chris has been published on elephantjournal.com, salon.com, gawker.com, elitedaily.com, thefix.com, shatterproof.org, etc. Chris received his bachelor’s degree from UMASS Amherst. He is currently pursuing a doctorate in clinical psychology at William James College in Newton, MA with a concentration in forensics. He is actively involved in several community recovery groups, and especially enjoys working with the incarcerated population.


Paul Sawyer is a Licensed Certified Social Worker with a broad range of experience in the behavioral health field. He has worked in inpatient, residential, and outpatient settings with individuals who are experiencing substance abuse and mental health challenges. He completed his Masters in Clinical Social Work at the Boston College School of Social Work.

Paul incorporates motivational interviewing and mindfulness with a strength-based, person-centered approach to help his client’s reach their personal goals. Paul has a talent for developing a strong therapeutic relationship with the individuals he works with by providing a genuine, compassionate, and non-judgmental environment. He believes that people can make lasting-changes to their lives given the proper conditions and support. He is open to, and driven by, each client’s stated goals, understanding that every journey to recovery is unique. In his free time, Paul enjoys hiking, playing soccer, racquetball, running, and just about any other sport, in addition to finding time for daily meditation.