Team

As President and Chief Executive Officer, David Nevins has oversight of all aspects of Showtime Networks and its channels. Nevins manages the Company’s programming, distribution, business development, finance, marketing, creative, digital media, scheduling, research, acquisitions, network operations, home entertainment, business affairs and corporate communications teams, as well as SHOWTIME Sports®. He also serves as the liaison to CBS Corporation’s international and domestic distribution groups. Under his tenure, SHOWTIME launched its stand-alone streaming service, along with ten hit series, including the critically-acclaimed originals HOMELAND, BILLIONS, THE AFFAIR, RAY DONOVAN and SHAMELESS – the network’s top-rated shows. The first project greenlit by Nevins at the network, HOMELAND was the recipient of Golden Globe® and Emmy® Awards for Outstanding Drama Series, as well as a prestigious Peabody Award. Before joining Showtime Networks, Nevins was an Emmy® Award-winning producer and network programming executive. He served as President of Imagine Television from 2002-2010, where he oversaw development, production and was an executive producer on all Imagine Television shows. Under his leadership, Imagine produced ARRESTED DEVELOPMENT, which won the Emmy for Outstanding Comedy Series, and 24, which won for Outstanding Drama Series. He also developed and executive produced PARENTHOOD, LIE TO ME, SHARK and the critically acclaimed series FRIDAY NIGHT LIGHTS, which received honors from the American Film Institute (AFI) for Television Program of the Year and the prestigious George Foster Peabody Award. Nevins also received an Emmy Award nomination for his work as an executive producer on the final season of FRIDAY NIGHT LIGHTS. Prior to joining Imagine, Nevins served as Executive Vice President of Programming at Fox Broadcasting Company. He oversaw all development and current programming for such series as THE BERNIE MAC SHOW, MALCOM IN THE MIDDLE, as well as the Emmy and Golden Globe® Award-winning first season of 24. Previously, Nevins served as Senior Vice President, Primetime Series at NBC, where he was responsible for the development and creative supervision of such renowned dramas and comedies as ER, THE WEST WING, WILL & GRACE,HOMICIDE: LIFE ON THE STREET and LAW & ORDER: SVU. In 2014, Nevins was awarded the prestigious Vanguard Award for Programmers, the National Cable and Telecommunications Association’s (NCTA) top honor. He serves on various industry boards, including the HRTS Board of Directors, the George Foster Peabody Awards Board of Advisors, the Paley Center Los Angeles Board of Governors, and is on the ATAS Executive Committee. Nevins currently serves as the Vice President and as a member of the Board of Directors for the Friends of the Saban Community Clinic.

Dr. David B. Agus is one of the world’s leading doctors and pioneering biomedical researchers. He is the Founding CEO of the Ellison Medical Institute and a professor of medicine and engineering at the University of Southern California.  A medical oncologist, Dr. Agus leads a multidisciplinary team of researchers dedicated to the development and use of technologies to guide doctors in making health-care decisions tailored to individual needs.  An international leader in global health and approaches for personalized healthcare, Dr. Agus serves in leadership roles at the World Economic Forum and is co-chair of the Global Health Security Consortium. He is also a CBS News contributor. Dr. Agus’ three books The End of Illness, A Short Guide to a Long Life, and The Lucky Years: How to Thrive in the Brave New World of Health, are all New York Times and international bestsellers. His latest book, The Book of Animal Secrets: Nature’s Lessons for a Long and Happy Life, was released in December 2023.  He is a 2017 recipient of the Ellis Island Medal of Honor.

Marcelo Bronstein was born in Argentina. He earned a degree in Clinical Psychology at the Universidad de Belgrano, and after concluding two postgraduate trainings he emigrated to the US to complete his rabbinic studies. He obtained a BA and MA in Jewish studies and attained Rabbinic ordination from The Hebrew Union College in New York City. He also studied at the Seminario Rabínico in Argentina and in Israel. Upon ordination, he moved to Santiago de Chile where he founded a congregation at the Estadio Israelita Maccabi. After six intense and wonderful years in Chile, Bronstein moved back to New York where he became one of the senior Rabbis for the next 23 years full-time and 3 additional years part-time, at the world-renowned Congregation B’nai Jeshurun, better known as “BJ”. Together with his dear friend and colleague Rabbi Rolando Matalon, they revitalized their congregation which then had a significant impact in synagogue life in America and the world at large. As a way to amplify this innovative model, Steven Spielberg’s Righteous Persons Foundation decided to enable the creation of a rabbinic fellowship providing training and support to newly ordained rabbis. Bronstein has served on the boards of health, ecology, interfaith, special needs and social justice organizations in America and abroad. Although his successful career, Marcelo in essence is a seeker. He never stopped learning and he never will. He always looks for immersive experiences that put him in places of discomfort and growth. This has taken him to do Vision Quests with native Americans, a Spiritual Trek in Nepal, participate in The Hoffman Process for change, to learn with Professor Otto Scharmer at MIT’s Presencing Institute and with educator and activist Parker Palmer at the Center for Courage and Renewal among other trainings. As a part of his duties as a pulpit rabbi, Marcelo brought his passion for Jewish mindfulness to his congregation in partnership with his dear friend Rabbi Rachel Cowan. Today Jewish mindfulness at BJ is practiced in the form of retreats, Shabbat, and High Holiday services. The English translation of the word Rabbi means “teacher”, and Marcelo is truly the embodiment of a teacher. While his education and interests in spirituality were originally rooted in Judaism, he now finds a high calling in combining life experience, psychology, and strategic human design into his work. A true miracle worker in his mentoring, Marcelo’s reverence for nature led him to move together with his wife, Karina Zilberman to “La Ecovilla”, Costa Rica, a 21st-century sustainable community, that he now calls home. He has his private practice as a Mentor/Coach online and leads Jewish Mindful. Bronstein is currently part-time rabbi at congregation B’nai Jeshurun in New York City. He has his private practice as a Mentor/Coach in Costa Rica where he sees clients in person and online. The act of seeking guidance can be one of the most courageous decisions we make. Change is inevitable, and as Marcelo Bronstein says, “Change is a courageous act of radical imagination.”

Shifra Bronznick is a strategist to social sector networks, organizations and leaders. Her long-term partnership with Auburn deepened its influence and impact on the multi faith movement for justice. Shifra created the groundbreaking Better Work, Better Life paid leave campaign. The Men as Allies initiative she launched has influenced creative approaches to diversifying thought leadership across sectors. The programs she designs support hundreds of women in cultivating their full potential and advancing social change, gender equity and racial justice. From developing a philanthropic leadership curriculum for Women Moving Millions, funded by the Bill and Melinda Gates Foundation, to creating the Feminist Fundamentals course for grassroots activists, Shifra has helped women across the generations — from Gen Z to baby boomers – to learn and change. Shifra was Founder and President of Advancing Women Professionals & the Jewish Community, recognized annually by the philanthropic guide, Slingshot, for leadership and innovation. She co-authored Leveling the Playing Field with Didi Goldenhar and Marty Linsky. Her action research projects with the Nathan Cummings Foundation, including Visioning Justice, strengthened the field of faith rooted social justice and led to the establishment of the Jewish Social Justice Roundtable. Shifra has been chosen three times by The Forward as one of the fifty most influential Jews. She received the Leading Lights award from the Future Work Institute, the Distinguished Leader award from A Better Balance and was a Ford Foundation Public Voices Fellow. The leadership strategist to the White House Project for over a decade, Shifra has been a senior fellow at the Research Center for Leadership in Action at NYU/Wagner Graduate School where she taught strategic leadership for the Executive Masters in Public Administration program.

Chip Edelsberg, PhD, consults with organizations on achieving greater measures of excellence. Chip brings 35 years of public and social sector leadership experience to his work. He focuses on assisting chief executives, senior professionals, and board members to develop skills essential to high performance in the 21st Century. Chip’s expertise is applied both at the organizational and individual levels in planning, project management, problem solving, and coaching engagements. As founding Executive Director of the Jim Joseph Foundation, one of the 100 largest foundations in the United States, Chip provided leader/manager direction for all aspects of the Foundation’s operations. The Foundation awarded $440 million dollars of grants during the period 2006-2016. For nearly a decade prior to this employment, Chip was Director of Endowments and Vice-President of the Jewish Community Federation of Cleveland. He led and managed a program of philanthropy which contributed $650 million dollars to beneficiary institutions and organizations. For fifteen years, Chip served as a teacher and public-school administrator. He was Director of Curriculum and Assistant Superintendent of Schools in Dublin (Ohio) and Superintendent of Oberlin, Ohio City Schools. In these positions, Chip interacted with diverse stakeholders and competing constituencies to build consensus and to generate financial commitment for public education initiatives designed to enhance student well-being and academic achievement. Leslie and Chip have been married for 44 years. They are proud parents of sons Eric and Zack and loving grandparents of four wonderful grandchildren.

Michael joined the IKAR board in 2010 and has been instrumental in launching a partner school project in the developing world to pair with IKAR’s own educational efforts, the Early Childhood Center and Limudim.  Michael is a Senior Vice President at HBO, overseeing dramatic series production.  Prior to HBO, Michael served as Senior Vice President at Scott Free Productions, where he served as a producer on such films as Prometheus, Robin Hood and Cyrus.  Before that, Michael was Vice President at Scott Rudin Productions. He received his A.B. from Dartmouth College in Government, and J.D. from New York University School of Law.

Rabbi Gary Greenebaum is a consultant, executive coach, writer and teacher living in Los Angeles.  He has expertise in organizational development, particularly leadership and board development.  He has worked as executive director of non-profit organizations for over 30 years. For more than two decades Rabbi Greenebaum worked for American Jewish Committee, an organization dedicated to protecting human rights and religious freedom in the U.S. and around the world. He served as the Los Angeles-based Western Regional Director of AJC from 1990-2006, and subsequently as AJC’s national Director of Interreligious and Intergroup Relations for four years. Long active in social policy issues, Rabbi Greenebaum served as President of the Los Angeles Police Commission, working to reform the LAPD in the wake of the Rodney King beating.  He has also served as a member of the Board of Governors of the State Bar of California.  He has worked extensively in international relations and as a result of his efforts to build bridges between the Jewish community and the French government, he was awarded the French National Order of Merit in 2006, which was presented to him by the French Ambassador to the United States. Greenebaum was Executive Producer of the 2007 feature length documentary film Darfur Now which was released by Warner Brothers and shown, by invitation, at the Toronto Film Festival. Until recently, Rabbi Greenebaum served as a member of the Board of Trustees of the Claremont School of Theology, which is affiliated with the United Methodist Church. Prior to working for AJC, Rabbi Greenebaum served as a congregational rabbi, as San Francisco Hillel Director, and then as the Regional Hillel Director for the San Francisco Bay Area. Ordained at HUC-JIR in Cincinnati in 1978, Rabbi Greenebaum also received an MA in Jewish Communal Service from HUC-JIR in Los Angeles. He completed intensive coach training sponsored by the Los Angeles Center for Non-Profit Management and accredited by the International Coach Federation.

Rev. Dr. Katharine Rhodes Henderson serves as Senior Advisor to Interfaith Alliance, a 30 year old organization, working nationwide through advocacy, mobilization and education to forge powerful alliances among people of diverse faiths and beliefs to build an inclusive, resilient democracy and fulfill America’s promise of religious freedom and civil rights for all. She is President Emerita of Auburn Seminary in New York City. During her tenure as President, she became recognized as a change agent, leading a 200 year old Christian institution with interfaith commitments, to become a national leadership development organization focused on building a multifaith movement for justice. In recognition of her accomplishments at Auburn, she was named co-recipient of the Guru Nanak Interfaith Prize for the innovative projects she led, including Auburn’s Face to Face | Faith to Faith Program, working with young leaders from conflict and post-conflict regions around the world, and the Auburn Senior Fellows network, a unique cohort of public faith leaders, recognized as the prophets of our time. She is the author of God’s Troublemakers: How Women of Faith are Changing the World (Continuum, 2006). Katharine is an ordained minister in the Presbyterian Church (U.S.A) and received her M.Div. from Union Seminary in New York City and her doctorate from Columbia University Teachers College. Katharine lives on a country road in the Hudson Valley of New York with her husband Chuck and their puppy, Nelson.

David Hirsch is a pioneering social entrepreneur who, for three decades, has spearheaded ventures and agencies that challenge the status quo, disrupt complacent markets and promote the public interest. He has served as President & Chair of B’nai Jeshurun (BJ) synagogue, one of the country’s oldest religious institutions, President & Chair of New York Cares, Entrepreneur-in-Residence at the University of Chicago NORC, the nation’s largest non-military think-tank and is Co-founder of National Center for Jewish Healing, an association of clinics for the spiritual care of the sick and dying.

Ellen Hoffman has always been a team player. She is a non-linear thinker and enjoys exploring new ideas. It is important to her that she make a difference and being a part of IKAR’s growth has been a privilege for her. Ellen is co-chair of the Architecture and Design committee for our future building. She plays an integral part in designing our annual Galas, including Party With A Purpose and Major Donor Dinner. Ellen is also involved in our Hesed team and was a member of the IKAR Board of Directors from 2009 until 2012. Professionally, Ellen is an interior designer. Ellen is also an integral part of American Friends of The Israel Museum, MOCA, and LACMA.

Rachel is part of the advisory team and President of The Hearthland Foundation, a family foundation established by Kate Capshaw and Steven Spielberg to help build a more just, equitable and connected America—one creative act at a time. With storytelling and art at its core, the foundation focuses on supporting eForts to build: a shared democracy, tell a more honest and generative American narrative, and foster a culture of accompaniment and care. Rachel is also the founder and president of Fundamental, a boutique philanthropic and political consulting firm. She has a background in public policy and government and has worked in philanthropy for close to three decades. She is a senior advisor to the Righteous Persons Foundation and the co-founder of Reboot, a network of Jewish creatives. Rachel also serves on the board of the Jim Joseph Foundation.

Marty Longbine received a BA in Special Education and taught in Riverside at the residential California School for the Deaf.  Years later, she returned to school to earn a masters degree in Architecture.  Soon after she began working in architectural design, she and Jeff Ayeroff married and had two daughters.  While making a Jewish home Marty became more involved and active in the Jewish community.  After joining IKAR, she served on the Board for six years and now is on the Advisory Board.  She joined in the advocacy efforts when the minyan tzedek paths were initiated and eventually became the co-chair of the IKAR Organizing path which has redirected her focus and energy to community organizing and leadership.

Yavilah McCoy, is the CEO of the Diversity consulting group DIMENSIONS Inc. Through Dimensions, Yavilah services an international portfolio of clients in the areas of Education, Philanthropy, and Social Justice. As an anti-racism activist with an international platform, Yavilah provides training and consulting to numerous social justice projects that span multiple identities and communities. Yavilah serves on the steering committee of the national Women’s March and has been a core part of many large-scale national movement teams, bringing a uniquely intersectional perspective to the ongoing work of racial justice and collective liberation. Yavilah is a pioneer of the Jewish diversity and equity movement and is an advocate and mentor for the empowerment of a transglobal community of Jews of Color. Yavilah was an inaugural recipient of the Spielberg Foundation’s Joshua Venture Fellowship and directed the launch of the “Ruderman Synagogue Inclusion Project” for Combined Jewish Philanthropies and the Ruderman Family Foundation. Yavilah also directed the Bronfman Philanthropy’s Curriculum Initiative in Boston, where she provided educational consultancy to 600 prep schools across the nation. Yavilah was voted one of “16 Faith Leaders to Watch” by the Center for American Progress in Washington, DC, is a certified coach for the Auburn Theological Seminary’s Pastoral Coach Training Program and an inaugural fellow of the Sojourner Truth Leadership Circle. Yavilah is a renowned national speaker, educator, and spiritual practitioner. In celebration of the musical traditions passed down to her from three generations of her African-American Jewish family, she is also the writer, producer and performer of the Jewish Gospel theatrical production “The Colors of Water.”

Joel Mogy is President and Founder of Joel R. Mogy Investment Counsel Inc. Joel is a Past Chairman of Vista Del Mar Child and Family Services, one of California’s largest comprehensive mental health agencies. He previously chaired Vista’s Investment Committee. He is a former member of both the Board of Governors of AJC (the American Jewish Committee) and its Executive Council. As a member of the Executive Council, he Co-chaired its National Governance Committee and served as a member of its Investment Committee. He is a Past Chairman of AJC Los Angeles where he was involved for many years in its regional International Relations program. Joel is an elected member of the Stanford Associates and is involved with the RAND Policy Circle. Joel received his AB from Stanford University and earned his MBA at Columbia University.

Ed Redlich is an Emmy-Award winner (“The Practice”) and has produced hundreds of hours of compelling television.  Prior to serving as Executive Producer of “SEAL Team,” on CBS, he was the creator and Executive Producer of “Unforgettable,” which ran for three years on CBS and one year on A&E.   He also served as Executive Producer for the first two seasons of “Without A Trace” and “Shark,” both on CBS. Redlich served as an Executive Producer on the beloved drama “Felicity” and a Producer on “The Practice.”  He has written for “The Twilight Zone,” “The Hitchhiker,” “Jack and Jill,” and “The New Love American Style.” He won an Emmy as a Producer of “The Practice,” and his episode “Spirit of America” won a Silver Gavel Award from the American Bar Association. He also received a CableACE nomination for his “Cinema Verite” episode of the series “Strangers” for HBO. Born and raised in Greenwich Village, Redlich was a History and Literature graduate from Harvard University.  He spent most of his time at school acting, appearing in over twenty university productions, and taking time off to study at the Eugene O’Neill Theater Center.  After college, Redlich attended New York University School of Law. He practiced corporate law in Manhattan for a year and a day, before leaving the firm to try his hand at writing. Ed is married to Sarah Timberman, who is also an Executive Producer of “SEAL Team.”  They both serve on the Board of Directors of Death Penalty Focus, a California abolitionist organization. They have two children, Noah and Zoe.

Steven Rubenstein got his Ph.D. in British Literature from Columbia and is now a teacher and owner of a software business catering to the entertainment industry (The Industry Edge).  Originally from the Philadelphia area, Steven moved to California after the Northridge quake and worked as a reader, development executive, and producer at Turner Pictures, Landscape Entertainment, and Mace Neufeld Productions, among others.  Steven has served as co-chair of the Jewish Federation’s Entertainment Division, and is an avid swimmer and hiker.

Amy Sloane-Pinel’s professional life has spanned thirty years of senior level experience in public affairs, corporate communications, and change management, including extensive strategic responsibility for public and private sector entities in Europe, the Middle East, Asia, and the U.S. In recent years, her focus has been on infrastructure as an impact investment and sustainable development instrument (ESG), particularly in building the public private partnerships so critical to supporting social infrastructure and capacity building in emerging nations and underserved communities. She has served as an adviser to ArtBasel, Paris Photo, Eurosport/Discovery Communications, The European Fine Art Foundation (TEFAF Maastricht), The Henri Cartier Bresson Foundation, Vivendi, Corbis, EMI Music Group, Bertelsman Music Group, Sapient/Publicis, and Sonia Rykiel, among others. In 2012, she joined Meridiam Infrastructure as a senior advisor to the chairman and founder, Thierry Deau. Meridiam is an independent investment firm specialized in the development, financing, and management of long-term public infrastructure projects. With offices in Paris, New York, Toronto, Istanbul, Dakar, and Luxembourg, Meridiam currently manages €5 billion of assets, and has invested over 50 projects internationally to date. She oversees the firm’s strategic partnership portfolio which includes the World Economic Forum, The Bretton Woods Committee, The German Marshall Fund, the Atlantic Council, and the Longterm Infrastructure Investors Association (LTIIA). She holds a BA in Art History from Harvard University and is both a U.S. and French citizen. She and her husband, Nicolas Pinel, and their two children, Alexandra and Charles, were based in Paris until 2012. Amy and Nicolas currently split their time between Paris and North Carolina.

Sarah Timberman and her Timberman/Beverly Productions partner, Carl Beverly, are currently in production on the first season of their new CBS series, SEAL TEAM, starring David Boreanaz. They recently completed the fifth season of their series ELEMENTARY. Timberman-Beverly’s other credits include their critically acclaimed SHOWTIME series MASTERS OF SEX (based on Tom Maier’s biography of noted sex researchers William Masters and Virginia Johnson), the award-winning FX series “Justified” (based on Elmore Leonard’s Fire in the Hole), “Kidnapped,” and “Unforgettable,” “The Odd Couple” and DOUBT, all on the Network. Prior to starting the company, Timberman served as the president of Universal Network Television. She oversaw all comedy, drama, long-form and reality programming for the company, including the “Law & Order” franchise and the series “American Dreams.” She played a key role in acquiring the rights to the British series “The Office” for NBC. Timberman joined Universal from Columbia TriStar Television, where she served as executive vice president of Drama Development. Some of the series she oversaw include “Dawson’s Creek” and “Party of Five.” Prior to working in television, Timberman was an assistant editor at Random House in New York. Timberman serves on the board of directors of the Hollywood Radio and Television Society, the board of directors of Death Penalty Focus, the advisory board of LAANE (Los Angeles Alliance for A New Economy), the NRDC’s Los Angeles Leadership Council, and the board of trustees of the “I Have a Dream” Foundation, Los Angeles. Timberman grew up in Greenwich Village, New York, and is a graduate of Brown University, with a B.A. in History. She is married to writer/producer Ed Redlich and they have two children.

Jon Turteltaub has been a leading producer and director of hit movies for the past 25 years. He is known for the films Cool Runnings, While You Were Sleeping, Phenomenon, National Treasure, National Treasure: Book of Secrets, Last Vegas, The Meg and many others. He has been married to Amy Eldon since July 6, 2006. Together they work extensively with The Creative Visions Foundation, supporting artists and activists. Jon has served on the DGA Western Directors Council, with the Jewish Federation, and on the board of the Inner-City Filmmakers program. Jon and Amy have spent considerable time in Africa where they have funded an orphanage in Kenya for the past 12 years while also working to protect and rehabilitate child soldiers in Uganda. Jon and Amy have three children, Jack, Daniel and Arabella…in that order.

Ari Wallach is the co-founder of Futurific Studios and Host of the 6 episode PBS doc-series “A Brief History of the Future.” He also is the founder and Executive Director of Longpath Labs and is the author of Longpath: Becoming the Great Ancestors Our Future Needs. Wallach’s TED talk on the Longpath mindset has been translated into 21 languages. Ari is the co-creator of  The Great Schlep with Sarah Silverman and was most recently an Adjunct Associate Professor at Columbia University. He has served as an advisor to the US State Department, United Nations and numerous organizations including the RacialEquity2030 Challenge, The Bezos Earth Fund’s AI For Climate and Nature Grand Challenge, the Gettysburg Project and Politico’s Long Game Forum.

Rachel joined the board in December 2013. She is grateful that she found a home at IKAR since moving to LA in 2010. She received her B.A. in English with a minor in Business from Washington University, where she met her husband, Jason. They are the proud parents of two children. She attended law school in at Cardozo in NYC where she was Acquisitions Editor of the Arts & Entertainment Law Journal. Rachel works as an in-house attorney for Chanel and serves on the board of the Fashion Industries Guild of Cedars Sinai, the L.A. Regional Board of Indego Africa, a nonprofit social enterprise that supports women artisans in Rwanda and is member of the Alliance of Moms. She hails from Baltimore with two sets of grandparents who were machers in their respective synagogues – so joining the IKAR board felt like a bit of a homecoming.

Rabbi Barbara Zacky received Rabbinic Ordination in 2009 from the Academy for Jewish Religion, California and studied clinical pastoral education 2007-09. Rabbi Zacky is a Co-Chair of the Founders Council at The Williams Institute at UCLA School of Law from 2014 to present. Rabbi Zacky serves on the Executive Board of Equality California Institute since 2018 and serves as secretary of the Institute. Rabbi Zacky participates on the IKAR Board of Advisors since 2020 and prior to the advisory board she served on the IKAR Board of Directors.