» MASH Team


Larissa Matzek, Executive Director

Larissa Matzek has served as MASH’s executive director since February 2019. In that role, she oversees all operations related to the agency’s mission of overseeing the voluntary certification of sober homes. Prior to joining MASH, Larissa managed the Advanced Manufacturing Futures Program at MassDevelopment, the state’s finance and development authority. She was also the executive director of the National Police Accountability Project at the National Lawyers Guild and worked at the Massachusetts Office for Victim Assistance. Larissa has a bachelor’s degree in communication from Salem State College and a master’s degree in nonprofit and organizational management from Brandeis University.

Silvia Dominguez-Bodie, Executive Assistant

Silvia Dominguez-Bodie has served as MASH’s executive assistant since December 2018. In this role, she wears multiple hats to ensure organizational effectiveness, efficiency, and accurate reporting. Before joining MASH, Silvia was the MetroWest Chronic Disease Self-Management Program Regional Coordinator at BayPath Elder Services. She has an associate’s degree in Early Childhood Education from Middlesex Community College and is a master trainer in chronic disease self-management.

Board of Directors

Jeff Gershman, President

Jeff Gershman is the Chief Executive Officer of Square Medical Group, a community-focused mental health and substance abuse agency. After working in investment banking and health care startups, Jeff joined Square Medical Group with the goal of creating responsible and effective behavioral health treatment in New England. He graduated from New York University’s Stern School of Business with a bachelor’s degree in finance and accounting. Jeff’s involvement with MASH began when he founded the Garnet Recovery Community in Quincy, a 21-bed men’s sober house. He has served on the MASH board since 2016 as treasurer and president.

Kathleen Delaney Campbell, Treasurer

Kathleen Delaney Campbell is the owner of KDC Accounting Solutions, a small accounting practice specializing in QuickBooks and Quicken consulting. She has a bachelor’s degree in accounting from the University of Lowell. Kathleen completed the coursework for the LADAC certificate in 2018 at the University of Massachusetts, Boston. She currently works at the Woburn Police Department as a recovery coach for The Police Assisted Addiction and Recovery Initiative (PARRI).

Laura Ames, Clerk

Laura Ames joined the Recovery Centers of America (RCA) in 2017. Laura has a Master of Science in Criminal Justice from Anna Maria College, a Master of Business Administration from Anna Maria College, a Master of Science in Nursing Administration and Patient Education from Anna Maria College as well as a Bachelor of Science in Nursing from Fitchburg State College. Laura has successfully opened and licensed both detoxification and clinical stabilization services at RCA. Laura is passionate about ensuring patient satisfaction and comfort at RCA at Danvers.

Bill Berneburg

Bill Berneburg is the owner-operator of 1,2,3 House, a network of sober homes. He opened his first sober house in Brockton in May 2012. 1,2,3 House has grown since its inception, with two more locations at 26 St. Casimir Avenue in Brockton and 57 Church Green in Taunton. Currently, the homes that are part of 1,2,3 House have 60 beds and are parole-approved. Bill, with the help of his house managers, is focused on helping men recover from the disease of alcoholism and drug addiction. He has been sober for 21 years. Bill has been a member of the MASH board since 2015 and is chair of the MASH ethics committee.

Denise Donovan

Denise Donovan is an assistant clerk magistrate at the Boston Municipal Court Department’s Central Division. She began working at the Boston Municipal Court in the Probation Department in 1994. Denise has a bachelor’s degree in Legal Practice in Criminal Justice from the University of Massachusetts Boston and a master’s certificate in Woman in Politics and Government from the University of Massachusetts Boston. In 2010, Denise graduated from Massachusetts School of Law with a Juris Doctorate degree and is a member of the Massachusetts Bar. Denise is passionate about helping people in recovery in both her professional career and her personal life.

Brian Murphy

Brian Murphy is the co-owner and operator of Recovery Upfront, a men’s sober home in Weymouth established in 2007. He also previously co-owned and operated two male sober homes in Quincy, and he is currently the owner and operator of BFM Painters and Home Renovators, a commercial and residential paint contracting business in Quincy. Prior to establishing his own business, Brian worked in various management positions at a contract engineering company in Boston and Los Angeles. He has served on the MASH Board of Directors since the organization’s inception in 2007.

Matthew Powers

Matthew Powers is the owner-operator of Chelsea’s House LLC, which has multiple homes for men and women in Chelsea and Lynn. He opened his first home in 2012 with his two brothers. The Chelsea’s House Franklin Street location was the first male MASH-certified house in the Commonwealth of Massachusetts. Matthew has served on the MASH Board of Directors for five years and is on the Ethics Committee. Matthew and his team at Chelsea’s House continue to sit on multiple recovery court teams that advocate for addicts and alcoholics. He is in long-term recovery himself and has built a successful mechanical company.

Richard Winant

Rich Winant is the director of The Kelly House, a men’s sober house in Wakefield. After working in corporate settings for more than 25 years, Rich made a career change to the recovery field. He is also a certified recovery coach and attended the University of Massachusetts Boston’s Addiction Counselor program. He served as MASH’s president from 2014 to 2018 and as a board member of the Reading Coalition Against Substance Abuse. As person in recovery for more than 14 years, Rich opened The Kelly House because he saw the need to help this vulnerable population. He has a bachelor’s degree from Clark University.

Charles Yetman

Charlie Yetman is one of the founders of MASH. In 1994, he and his sister Paula also founded Yetman Sober Housing. Charlie is licensed by the Bureau of Substance Addiction Services and is also a criminal justice specialist. He teaches at the University of Massachusetts Boston and has testified in various courts as a substance abuse expert and speaks at events nationwide. In addition to serving on the MASH board, Charlie serves on the board of Gavin Foundation and as president of the board of Edwina Martin House for women.


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