Instruction, resources & community for those seeking greater awareness, wisdom, and transformation through the Jewish spiritual path of Mussar.



Board Members


Photo of Daniel Beaupain
Daniel Beaupain

Daniel currently practices as a legal guardian/trustee, after decades of being active as a management consultant. He is a gabbai, teacher and board member at the Liberal Jewish Congregation of Amsterdam. Daniel is one of two Mussar facilitators and leaders outside the U.S. and supports or facilitates three Mussar va’adim in the Netherlands and one in Germany. He has been participating in a multinational va’ad since 2005, has been principal teacher of the Mussar Institute Europe since its founding and has translated “Everyday Holiness” into Dutch.

Photo of Matthew Blumberg
Matthew Blumberg

Matthew Blumberg is a social entrepreneur living in Cambridge, Mass., designing tools and systems for distributed computing and collective problem-solving. He has studied Mussar for more than 10 years, led groups merging creative writing and Mussar practice, and has served on the TMI board since 2014.

Photo of Karen Cheniae
Karen Cheniae

Karen Cheniae, of Dallas, Texas is a CPA and Chief Financial Officer at Lebco,  a retail and real estate development company. In her 25 years with Lebco she has supervised operations and administration of Lebco’s $70 million annual budget.  Karen began practicing Mussar in 2011 and says she is honored to be able to give back to The Mussar Institute by serving as Treasurer.

Photo of Leslie-Anne Copes-Finke
Leslie-Anne Copes-Finke

Leslie-Anne Copes-Finke is a leadership development consultant for Combined Jewish Philanthropies. She is past president of Beth El Temple Center in Belmont, MA and past development director for the Boston Baroque. She holds a BFA at UCLA School of Theater and Film.

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Sandy Diamond

Sandy Diamond is the Director of Development at Temple Emanu-El in Dallas, Texas. Her 30-year career in development spans the private and non-profit sectors. Sandy’s non-profit work has been in education, social services, and Jewish educational administration and fundraising. Sandy says she has benefitted greatly from her Mussar classes and her teachers. She is new to the Mussar Board this year and is looking forward to giving back to The Mussar Institute.

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George Gabanyi

Bio coming soon

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Sandra Lief Garrett

Sandra Lief Garrett is a program and resource development consultant to nonprofit organizations. She comes to the role following a four-decade career in leadership positions in the public and nonprofit sectors in which she focused on helping women, children, new immigrants and refugees succeed. She has studied and practiced Mussar since 2011, and joined the Board in 2012. She is honored to work with the Board and staff on the expansion of The Mussar Institute to enable more individuals, organizations and communities to experience this life-changing Jewish spiritual path.

Photo of Steve Goldberg
Steve Goldberg

Steve Goldberg is a business attorney and restaurateur in Detroit Michigan.  Finding a spiritual calling early in life with a traditional Jewish family and yoga practice since 1972, Steve was a natural to Mussar.  Beginning Mussar practice in 2013, he has followed a steady progression of TMI distance learning offerings, traveled on the Israel 2017 mission, and is a member of Rav Nussbaum’s va’ad.

Photo of Sandy Greenstein
Sandy Greenstein

Sandy has more than 30 years of experience in manufacturing, construction, and risk management-loss control. He lives in beautiful Thousand Oaks, Calif.
Sandy feels it’s an honor and privilege to associate with so many wonderful people who have a similar approach to want to live in a better world. He believes strongly in Mussar’s path of Jewish character development and spiritual growth leading to awareness, wisdom and transformation. As a member of the board, he has an opportunity to work to bring the study and practice to Mussar to others. He believes that by practicing Mussar and as a Mussar Facilitator, he has helped close the gap between his ideals and the life he actually leads.

Photo of Robert Mass
Robert Mass

Robert Mass is Senior Advisor, Compliance Division, The Goldman Sachs Group L.P. Prior to joining the firm, Rob was an assistant district attorney in New York County, where he served as deputy chief of the Investigation Division and chief of the Labor Racketeering Unit. Prior to that, he worked at Kramer, Levin, Nessen and Kamin, a New York corporate law firm, and at the American Civil Liberties Union. Rob is chairman of the FCA Markets Practitioner Panel. Rob is a graduate of the University of California, Santa Cruz, and Harvard Law School.

Photo of Bonnie Pastor
Bonnie Pastor

Bonnie Pastor is an estate planning attorney in Los Angeles, Calif., and a new member of the Board. She facilitates Season of Mussar groups, is a Co-Chair of the TMI International Team and a member of the Social Justice Va’ad. Over the last seven years, she has enjoyed and benefited greatly from participating in a number of TMI classes, practice retreats and kallot.

Photo of Irv Robinson
Irv Robinson

Irv Robinson recently sold his plastics manufacturing business of 45 years. He has served in various leadership and non-leadership roles in Kansas City-area nonprofit organizations. Irv has been studying Mussar since 2009, has facilitated courses since 2012 and has served on the TMI Board for several years.

Photo of Annabelle Tuck
Annabelle Tuck

Annabelle Imber Tuck is the first woman elected justice of the Arkansas Supreme Court and the author of the original order that reshaped the financing of public education in the state. In 1994, she issued an order declaring the state’s system of funding and operating its public schools unconstitutional and gave the Arkansas General Assembly two years to produce schools that guaranteed every child the same opportunity for a good education, as the state constitution required. She was reelected twice before retiring.