Our Team



Keith is Executive Director/CEO at the Support Center, and leads efforts to develop and promote an integrated and collaborative approach to capacity building for nonprofit organizations and social enterprises. Prior to joining the Support Center/Partnership in Philanthropy, Keith was the Director & CEO with Build with Purpose, a nonprofit real estate development organization. Keith brings over fifteen years of experience in community development including: involvement in educational reform issues with The Center for Collaborative Education in New York City; experience in leadership development and management programs as the former President of the Leader to Leader Institute (formerly the Peter F. Drucker Foundation); and exposure to policy and community development approaches across the country during his time with Living Cities: The National Community Development Initiative. Keith has a Bachelor’s degree in History and Russian from Rutgers University and a Master in Business Administration from Columbia University.


Justine Ambrose is a Program Associate at Support Center, working across the organization’s portfolio of consulting and executive transition clients to assist with intake processes, contract management, and proposal development. She has worked in program administration at non-profit organizations since 2008, including seven years at the educational professional development organization Facing History and Ourselves in New York. Justine holds a B.A. in Urban Studies from Vassar College.


Gabriela Barria is on her last year as a graduate student at the College of Saint Elizabeth, working on her Masters in Management with a specialization on Organizational Change. Gabriela completed her undergrad with a B.A. in Business Administration in May 2017. She currently works as a Graduate Assistant for the Office of Admission at College of Saint Elizabeth. Prior to joining the Support Center, Gabriela interned at Seldat Distribution and the New Jersey Office of Faith-Based Initiatives (NJOFBI) at the Department of State in Trenton, NJ.



Carolyn has spent most of her career working on behalf of the social sector. Prior to joining the Support Center, she developed and directed programs focused on education, leadership development and sustainability at the Philip Evans Scholarship Foundation, a division of The Kohlberg Foundation in Mount Kisco, NY. From 1998 – 2007 she was instrumental in launching and running the Social Enterprise Program at Columbia Business School to educate MBA students and professionals in nonprofit management, social entrepreneurship and corporate citizenship. She began her career as a research assistant and administrator at Metis Associates, Inc., a national consulting firm based in NYC, where she evaluated education programs in NYC schools and managed the firm’s operations. Carolyn has a Bachelor’s degree in International Studies from Allegheny College and a Masters in Public Policy from the University of Pittsburgh. 


Contact Don if you are a grantmaker or media representative to learn more about the Support Center’s programs and services or sector-wide nonprofit leadership issues.

Prior to becoming a Senior Fellow in January 2016, Don Crocker led the Support Center as its CEO from 1998 to 2015, working closely with grantmaker partners to address the needs of our nonprofit communities.  He has more than 25 years experience in the nonprofit and philanthropic sectors and is nationally recognized as a leader in the areas of leadership and executive transitions, board performance, and nonprofit/foundation effectiveness.  Don was formerly an associate consultant for BoardSource in Washington, D.C. and is a trained practitioner for their self-assessment process.  A small sampling of the foundations and corporate foundations Don has worked with include the Robert Wood Johnson Foundation, Rockefeller Philanthropy Advisors, the Princeton Area Community Foundation, The Clark Foundation, the Prudential Foundation, PSE&G, and the JPMorgan Chase Foundation.

Don holds an M.S. in Leadership and Strategic Management from Manhattanville College, and a B.A. in Psychology and Education from Queens College of CUNY.  He has served a Selection Committee member for the New York Times Nonprofit Excellence Awards and currently serves on the Board of Directors of Grantmakers for Effective Organizations (GEO) in Washington, D.C. Don is an adjunct professor in the graduate division of New York University’s Heyman Center for Philanthropy and Fundraising in New York City.


Crystal leads the Support Center’s operations and finance functions, managing the administration of consulting, coaching and training agreements and assisting in data management and IT coordination. She brings a range of administrative, human resources and financial expertise to the Support Center from previous experiences in the corporate and nonprofit sectors. Most recently she handled administration, IT and budgeting for the NYC Build It Back program, and previously, with other nonprofit organizations.


 Lakimja Mattocks is the Associate Director of Strategic Partnerships and Learning at the Support Center. She oversees the Professional Development Course Catalogue which includes the Executive Leadership and Leadership & Supervision Certificate Programs. Prior to joining the Support Center, Lakimja spent eight years in youth and staff development with a focus on youth leadership through service learning, college preparedness and access, work readiness, situational leadership and coaching. Lakimja completed The Coaching Mindset training program at the Nonprofit Help Desk and the Leadership Caucus program at the Community Resource Exchange (CRE). She also possesses a Master’s in Public Administration with a focus in Non Profit Management from Baruch College, loves to volunteer in the area of College Access and holds Alumni Leadership roles with her beloved alma mater, Temple University.


Xander is the Director of Programs at Support Center, where he oversees the Executive Search practice and Interim Executive Director training and placement programs. He also manages Support Center’s impact economy initiatives, which support social enterprises, revenue-generating nonprofits, and impact investors and funders. Xander has worked at Support Center in several capacities since the fall of 2015, when he joined the organization as a Board Fellow while in graduate school. There his studies centered on philanthropy and impact investing, nonprofit management, social enterprise development, and leadership in education. Prior to graduate school and working at Support Center, Xander was an educator focusing on experiential and service learning, as well as a middle and high school Latin teacher, college counselor, and varsity coach. He holds an MBA from Columbia Business School, an MA in school leadership from Teachers College, Columbia, and a BA in Latin and Greek from Haverford College.

Affiliate Consultants


Frank Abdale has worked on numerous succession planning and strategic planning projects for the Support Center, including the succession plan that led to our new Executive Director.   Frank is a proven strategist and facilitator, and the writer and editor of numerous publications, articles, and manuals. He is the co-author of “Practical Abundance: A Comprehensive Guide to Fundraising and Development for Nonprofits” and has taught strategic planning, fundraising and advocacy at the Support Center since 2009.


Janice Alderman has worked in development for more than 25 years. Through JAZ Consulting, she has provided more than 20 organizations with annual campaign, major gift, foundation and corporate fundraising consulting, managed grant writing, lead strategic planning initiatives, created communications strategy, trained board members in development, aided in board development and provided copywriting. Prior to that, she was Vice President of Development for Children’s Aid and Family Services in Paramus, NJ and served as the Director of Development for Women in Cable and Telecommunications.


Helene Blieberg is a thought leader in the nonprofit management and communication fields and has been providing management, communication and grant making services to corporations, foundations and nonprofit organizations across a range of program areas since 2001. Her clients have included the American Craft Council, American Express, Andrew W. Mellon Foundation, Ballet Hispanico, Baruch College/CUNY Center for Arts Education, New York State Artist Workspace Consortium, Pfizer Inc., United States Institute for Theatre Technology and the Upper Manhattan Empowerment Zone. She also served on the faculties of New York University and Baruch College, where she taught undergraduate and graduate arts administration, communications and public relations courses. Helene spent 18 years with CBS, having held management positions in philanthropy, communications, media relations, sales development and promotion. She served as Vice President and Executive Director of the CBS Foundation and as Vice President of Communications for CBS Radio nationwide. She has also been a marketing and sales executive in the hospitality industry and was an account executive at a New York public relations firm. She attended the University of London and is a Phi Beta Kappa graduate of the University at Buffalo. Helene currently serves as Vice Chair on the Board of Directors of the Alliance of Resident Theatres/New York and is on advisory boards of the Coro New York Leadership Center, and the Support Center | Partnership In Philanthropy.


Lee is an Affiliate Consultant with the Support Center and the Principal of LWB Consulting.  Lee consults on organizational structure and development, HR operations and strategy, system evaluation and implementation, risk management, and coaching and mentoring.  Lee’s background is in a variety of businesses including government and healthcare to risk management and multi-service organizations.  In addition to HR and operations, her responsibilities have spanned corporate communications, program implementation and hospital administration in the non-profit and healthcare worlds of New York City. She has a Bachelor’s degree from Barnard College and began her career in City government working in the Mayor’s office for Mayor Ed Koch on social service issues.  Lee serves as an executive board member for a local community organization as well serving on the board of non-profit organization that supports international work.


Christine Brown has been supporting nonprofit leaders and their organizations for the past 14 years by bringing a business perspective to her passion for making a difference. As an organizational consultant, strategic planner and executive coach she has encouraged clients to look beyond what they believe is possible and imagine new possibilities for their organizations and themselves. She currently serves as a consultant in the areas of fundraising and strategic planning and facilitator of the Partnership in Philanthropy Leadership Development Roundtable for Executive Directors.
Her consulting services include strategic planning, organizational effectiveness assessments and recommendations and financial mentoring. Ms. Brown provides executive coaching to exeutive directors, board leaders, and senior staff. She also serves as an Interim Executive Director for organizations in transition to allow time to refocus and to recruit new leadership. Before becoming a consultant she was the Associate Executive Director of the Fresh Air Fund in NYC for eight years and held senior level positions in the telecommunications industry for 14 years. She is a former board members of GlassRoots in Newark, NJ. Ms. Brown hold an MBA from George Washington University, an MSW from Columbia University, and is a Professional Certified Coach with the International Coach Federation.


Dr. Melba Butler is the founder and principal of Butler Consulting.  The firm specializes in leadership capacity building including management and board coaching; board development, team building; and strategic planning; facilitating  strategic alliances and project management.  Melba has extensive experience in executive level human services management, policy, program development and coalition building.  She has served in leadership roles on numerous boards, task forces and coalitions.  Melba received an MS in Social Work from Columbia University and a PhD in Social Welfare from the Graduate Center at City University of New York.  She is a BoardSource Certified Governance Trainer and an adjunct professor at the Silberman School of  Social Work at Hunter College.


Katharine Harris brings nearly 20 years of experience in the nonprofit sector both in New York and Los Angeles and has been affiliated with the Support Center since 2004. She attended the very first Interim Executive Director (IED) training and Executive Search and Transition Management Consultants (ESTM) training in 2005. Through the Support Center, Katharine has served as the transition consultant for Helen Keller Services for the Blind and Helen Keller National Center, Columba Kavanagh House, and Alliance for the Arts. Katharine co-facilitated the Support Center’s two-day IED training in 2008 and 2012 and was the Interim Professional Development Director in 2011.

Katharine’s fields of expertise include homeless services, communities of faith, children, and the arts. Her consulting skill areas include executive search, succession planning, organizational assessment, board development and fundraising. On all client projects Katharine considers herself the “strategic partner with the objective voice”. 


Gilles Mesrobian is a skilled consultant with expertise in organization restructuring, executive search and transition management, mission change and executive coaching.  He formerly served as the Executive Director of Miracle House of New York and as membership Director of the Institute for the Advancement of Health.  More recently, he served as Interim Executive Director at Abraham House, Reeves-Reed Arboretum, the General Society of Mechanics and Tradesmen of the City of New York.

Gilles has worked within projects funded by such foundations as the Fairfield County Community and Lone Pine Foundations in Connecticut and the Prudential Foundation in New Jersey.  Gilles holds an M.S. degree from Boston University in International Communications/ Journalism and a B.A. in Economics from the University of Toronto.   Gilles is a Tanenbaum Leadership Initiative Fellow of the Milano School for Non Profit Management, and is bilingual in French/English.


Laurel Molloy is Founder & Chief Consultant of Innovations Quantified (IQ). Since 1999, IQ has been helping organizations increase their impact through its training, program design, and outcome measurement services. Clients include local, national, and international agencies like the Actors Fund of America, Atlanta Women’s Foundation, Boys & Girls Clubs, FDNY Counseling Unit, Riverkeeper, and the UN International Labour Organization. Laurel has been a trainer and affiliated consultant at the Support Center for over a decade, and is known for her practical and engaging approach to outcomes-related work. She holds an MPA in Nonprofit Management from NYU Wagner, and wrote the widely-utilized guidebook, Finally – Outcome Measurement Strategies Anyone Can Understand.


Tonia has been affiliated with the Support Center for over 20 years as a consultant, interim financial officer and workshop facilitator. She has over 30 of international and domestic experience in the areas of financial analysis and management, strategic and business planning, treasury management and outsourced CFO. She has served as CFO for almost two dozen nonprofit organizations throughout the NY metro area and has worked with domestic and international nonprofits to create and implement strong internal controls, install nonprofit fund accounting systems, create financial reporting systems, and develop investment policy statements. She has had successful client engagements through the Support Center including but not limited to New Jersey Community Capital, Helen Keller Services for the Blind and SCAN. She leads workshops on financial issues including budgeting, financial statements, audit preparation and investment policy statements. She has been an adjunct professor at Adelphi University, Columbia University, and New School for Social Research. She holds an MBA from Columbia University Business School, an MS in Urban Planning from the Columbia University Graduate School of Architecture, Urban Planning, and Historic Preservation and a BA from Macalester College. Tonia Papke is also a CERTIFIED FINANCIAL PLANNER®, providing expertise in investment management and retirement plans to nonprofit organizations and individuals.


Regina Podhorin is the President of The Leadership Group and has over 25 years of experience in the nonprofit sector. She has worked as an executive director and interim executive director with state and local governments, and as a nonprofit board member. Regina has an MPA from Rider University.

With 35 years of NPO experience, Regina gained her knowledge on the practical applications of finance as a 13 year ED and by serving as an IED multiple times. She has delivered well over 100 financial workshops and hands-on financial technical assistance sessions and is a senior consultant for the Support Center.


Richmond is President and Founder of Rabinowitz Partners and has over 25 years of experience in senior level management for both nonprofit and government organizations. She is a skilled interim executive, consultant and trainer. Since opening her own business, she has served as Interim CEO, Interim Communications Director and Interim Development Director for some of New Jersey’s most esteemed nonprofits. In the role of interim leader, she has started, been a “turn around” specialist, merged and closed organizations. Most recently, Richmond served as Interim CEO of Lead New Jersey and Boys & Girls Clubs of Newark.

As a consultant, she specializes in working with trustees and executives to advance organizational strategies and solutions while helping keep operations productive and on goal.
Working with leaders to enhance organizational performance is central to all her consultancy.

Before beginning Rabinowitz Partners, Richmond served as Interim Director and CEO of Citizens for Better Schools an organization that advocated for high quality early education and ran several programs geared to strengthening the performance of school and district leaders. Prior to that, Richmond was Associate Director of the Partnership for New Jersey, a forum for the chief executives of major corporations, leading nonprofit organizations and educational institutions in the state.

Richmond served as policy coordinator for the Division of Juvenile Services in New Jersey’s corrections system leading the effort to move all juvenile services out of the Department of Corrections. She additionally had oversight of female programs within the Division. Richmond began her nonprofit career with the Association for Children of New Jersey (now Advocates for Children of NJ), where she was Senior Policy Analyst specializing in adolescent issues and lobbying strategies.


Pat Richter has been affiliated with the Support Center since 2002 in many capacities, including as a volunteer facilitator of workshops, affiliated consultant, C.O.O. interim, and most recently the Interim Director of Consulting. She consults (PRQuickhelp) nonprofits and foundations both large and small. Areas of expertise include proposal writing, strategic planning, program planning, research, and organization assessments. Fields of expertise include health, developmental disabilities, and domestic and substance abuse. Pat has a Master’s in Public Administration from Pace University and has completed advanced coursework in alcoholism studies from Rutgers University.


Wendy Seligson is an Affiliate Consultant with the Support Center and founder of Wendy Seligson Consulting, a nonprofit management consulting firm specializing in business and financial planning, organizational systems development, coaching and professional development and strategic approaches to managing risk.  With over twenty years as senior executive and chief operating officer in New York City nonprofits, Wendy is experienced at managing complex nonprofit organizations.  As the Associate Executive Director of the 14th Street Y from 2007 through 2015 , Wendy managed the Y through a period of rapid growth in which the program size and revenue doubled over five years;  she is particularly proud of her work at the Y building high functioning teams and mentoring and developing talented middle-managers to achieve these results.  Wendy has JD from New York University School of Law and an undergraduate degree from Duke University.


Dart Westphal brings over 25 years of experience to his work as an organizational development consultant.  Formerly the President/Chief Executive Officer of the Mosholu Preservation Corporation in the Bronx,  he coordinated multi-family acquisition and rehabilitation, cooperative conversion, condominium new construction and provided technical assistance to landlords and small businesses in the community.  He has been instrumental in developing the Bronx River Alliance, developed new funding methods for supportive housing, created a Business Improvement District and started a nonprofit newspaper. He has wide experience in real estate development, community collaborations, environmental and faith based organizations.

Dart also served in positions with the New York City Department of Housing Preservation and Development, and the South Bronx Open Space Task Force.  As part of the Support Center’s team, Dart is collaborating on the development of the Trajectory Leadership Project and is part of a multi-disciplinary team developing a new corporate structure for a national nonprofit.  Mr. Westphal holds an M.A. in Anthropology from Catholic University in Washington, D.C., and is bilingual in English/Spanish.


Marie Zieger is a nationally and internationally recognized consultant and facilitator working in the nonprofit and philanthropic field for over 20 years.  A skilled facilitator, Ms. Zieger is recognized for her expertise in Strategic Planning, Executive Search and Transition Management, and Organizational Assessment.  She conducts workshops in a wide-range of nonprofit management areas (strategic planning, supervisory skills, team building), and is an executive coach.  Marie has facilitated projects supported by a host of foundations including the Robert Wood Johnson Foundation, the Prudential Foundation, and the Princeton Area Community Foundation.  She has been a regular trainer at the Annual Conference of the Kansas Health Foundation.

Marie previously served as Executive Director of the Support Center of New Jersey and also held management and training positions with the Support Center and the United Way of Morris County in New Jersey.  Marie holds a B.A. in Social Work and is a certified trainer through Interaction Associates of Boston and San Francisco.

Board of Directors

Jack Bode,

Karen Brown, Fairfield County Community Foundation

PeiYao Chen, Global Fund for Women

John Emmert, Chief Financial Officer, New York Women’s Foundation

William P. Falahee, Treasurer The J.M. Kaplan Fund, Inc.

Jennifer Goldstone, Vice Chair, Xukuma, LLC

Douglas Gould, Douglas Gould and Company

Amy Holmes, Chair, Rockefeller Philanthropy Advisors

Matthew P. O’Dell , Condon O’Meara McGinty & Donnelly LLP

Zeeshan Razzaqui, Goldman Sachs Asset Management

Jeffrey Robinson, The Center for Urban Entrepreneurship & Economic Development, Rutgers Business School

Ralph Rogers, Wells Fargo Advisors, LLC

Margarita Rosa, Caribbean Cultural Center African Diaspora Institute

Laura Rossi,
Executive Director,
Westchester Community Foundation

Louise Shea, The New York Public Library

Anne Sherman, Social Impact Exchange

T. Peter Sullivan, (Former PIP Board Member) Retired – Communications

George Suttles, Secretary, The John A. Hartford Foundation

Keith Timko, Executive Director/CEO

Phillip Yang,
Prudential Financial

Leadership Council

Our Leadership Council members are peers in the nonprofit sector who act as a resource for the Support Center staff and Board. They play the valuable roles of advisors, spokespeople andambassadors for our programs and services.

Jack Bode, Co-Chair and SC Board Member

Diane Manning

Doug Bauer,
Clark Foundation

Melissa Beck,
The Educational Foundation of America

Thomas Blaney, O’Connor Davies Munns & Dobbins, LLP

Helene Blieberg, Helene Blieberg Associates

Gale Brewer, Manhattan Borough President’s Office

Richard Brown, American Express Foundation

Rohit Burman,

Donna Colonna, Services for the UnderServed

Laura Cronin, The New School

Robert Danzig,
U.S. Trust

Jane S. Englebardt, Upshot Advisors

Paul Gangsei, Manatt, Phelps & Phillips, LLP

Anne Green, Griffin Green Consulting

Joanne Heyman, Heyman Partners

Greg King, Strategic Philanthropy Advisors

Carol M. Kurzig

Matthew McCrosson, O’Connor Davies Munns & Dobbins, LLP

Richard McKeon, Career Readiness Initiative at Council of Chief State School Officers

Tonia Papke, MDI Consulting

Christine Park,
Philanthropy Consulting

Heather Robinson, Good Grief

Arie Weissman,
Weissman Consulting Services