» 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 is MASH’s executive assistant since December 2018. In this role, she wears multiple hats in order to ensure organizational effectiveness, efficiency, and accurate reporting. Before joining MASH she was the MetroWest CDSMP Regional Coordinator at BayPath Elder Services. Silvia has an associate’s degree in Early Childhood Education from Middlesex Community College and is a master trainer in chronic disease self-management and in “a matter of balance.”

Board of Directors

Jeff Gershman, President

Jeff Gershman is the Chief Executive Officer of Square Medical Group, a community focused mental health/substance abuse agency. Jeff graduated from New York University’s Stern School of Business with a bachelor’s degree in Finance and Accounting. After working in Investment Banking and Healthcare Startups Jeff joined Square Medical Group with the goal of creating responsible and effective behavioral health treatment in the New England Region. Jeff’s involvement with MASH began with his founding of the Garnet Recovery Community in Quincy, a 21 bed men’s sober house. He has served on the MASH board since 2016 in capacities as Treasurer and President.

Brian Murphy, Clerk

Brian Murphy has served on the MASH Board of Directors since it’s inception in 2007. Brian is the co-owner and operator of Recovery Upfront, a men’s sober home in Weymouth, which was established in 2007. He was also the co-owner and operator of 2 male sober homes in Quincy. Brian is also the owner/operator of BFM Painters and Home Renovators, a commercial/residential paint contracting business located in Quincy. Prior to establishing his own business, Brian worked in various management positions in a contract engineering business in the Boston and Los Angeles.

Damien Turini, Treasurer

Damien is a Vice President and Clinician at Modern Assistance. Damien Turini holds a Master of Arts degree in Applied Economics and a Master of Science degree in Counseling Psychology. He previously served as the Coordinator of Education and Workforce Development for a Substance Abuse Program at the Boston Public Health Commission and for the Commonwealth of Massachusetts conducting policy work on human service and substance use disorder services in Massachusetts. He is a part-time instructor with the Addictions Education Certificate Program at the University of Massachusetts Boston and a former Board Member of SPAN, Inc., an agency dedicated to providing services to formerly incarcerated individuals. Damien currently serves as Treasurer on the MASH board. He is also a current board member of Edwina Martin House, a women’s Recovery Home.

Bill Berneburg

Bill Berneburg is the owner-operator of 1,2,3 House. He opened his first sober house in Brockton in May of 2012. 1,2,3 House has grown over the last seven years adding two additional locations at 26 St. Casimir Avenue in Brockton and 57 Church Green in Taunton. Currently, the 1,2,3 Houses have 60 beds and are parole approved. Bill Berneburg with the help of his house managers is focused on helping men recover from the disease of alcoholism and drug addiction. Bill Berneburg has been sober for 21 years. He has been a member of MASH since 2015. In addition to being on the board of directors Bill is the chair of the MASH ethics committee.

Matthew Powers

Matthew Powers is the owner-operator of Chelseas House, LLC. He opened his first home in 2012, with his two brothers. Chelseas House, LLC has multiple homes for men and women in Chelsea and Lynn. Chelseas House Franklin Street location was the first male MASH certified house in the state of Massachusetts. Matthew has served on the MASH Board of Directors for 5 years and served on the Ethics Committee. Matthew and his team continue to sit on multiple Recovery Court Teams advocating for addicts and alcoholics. Matthew is in long term recovery himself and has also 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 America for 25+ years, Rich made a career change to the recovery field. Rich is also a Certified Recovery Coach and attended UMass Boston’s Addiction Counselor program. Rich has a B.A. from Clark University. He is a former president of MASH (2014-2018),as well as a board member of the Reading Coalition Against Substance Abuse. Rich is a person in Recovery (14+years) and opened The Kelly House because he saw the need to help this vulnerable population.

Charles Yetman

Charlie Yetman is one of the original founders of MASH. In 1994, he and his sister Paula, founded Yetman Sober Housing. Charlie is licensed by the Bureau of Substance Addiction Services and is also a criminal justice specialist. Charlie teaches at the University of Massachusetts Boston. Charlie has also testified in various courts as an 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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