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Staff

Hazon staff are located across the United States and are listed below in alphabetical order by last name.

Click here for contact information by region and department.

Aharon Ariel Lavi   Director of Hakhel

Aharon Ariel Lavi is the founder and director of Hakhel: The Jewish Intentional Communities Incubator in the Diaspora. Lavi is a professional community organizer and serial social entrepreneur who believes that networks are key to shaping our reality. Lavi is co-founder of Garin Shuva on the Gaza border; the Nettiot Intentional Communities Network, reengaging Haredi Ba’aley Teshuva into society; And MAKOM: the national umbrella organization of intentional communities in Israel. Lavi lives with is wife Liat, their four children, and a dog in the Negev and when he doesn’t work or study Torah he likes riding his bikes in the open fields of the Negev, and desperately trying to learn to play the flute, a guitar or anything that makes music.

Shuva, Israel | 718.305.7075 (US) | 972.50.473.4513 (Israel) | lavi@hazon.org
Nate DeGroot   Hazon Detroit Associate Director, Spiritual & Program Director

Rabbi Nate DeGroot is the Hazon Detroit Associate Director and Spiritual & Program Director. In this role, he is helping the Detroit Metro Jewish community to reconnect with their own inherited earth-based Jewish spirituality and reinvest in their historic relationship with the Detroit community around its transformative environmental justice work. He was ordained at Hebrew College in Boston, where he also received a Masters in Jewish Education. He most recently served as the inaugural Jewish Emergent Network Rabbinic Fellow at IKAR in Los Angeles, and before that founded a grassroots cooperative Jewish community in Portland, Oregon. He is a lover of the wild and is excited to bring his passion for all things sacred to his work at Hazon.

Detroit, MI | nate.degroot@hazon.org
Morgan Dorsch   Associate Director of Development

Morgan serves as Hazon’s Associate Director of Development in the New York office, supporting both foundation and individual fundraising. Prior to joining Hazon she was a Program Associate at a private foundation. Morgan earned her bachelor’s degrees from List College, the joint program between Columbia University and the Jewish Theological Seminary, receiving a B.S. in Environmental Biology at Columbia University, and a B.A. in Bible at JTS. She can often be found in one of New York City’s many parks.

New York, NY | 212.644.2332 x307 | morgan.dorsch@hazon.org
Rebecca Eisen   Human Resources Manager

Rebecca Eisen is the Human Resources Manager. She works with and for the employees, dealing with training, benefits, and ensuring all policies and procedures are followed. Rebecca has worked in the financial, retail, health, and start up industries. The bulk of her HR experience comes from IKEA Long Island where she was responsible for training and development of all employees. She received her Masters Degree in Human Resources Management and Labor Relations from NYIT where she was the Vice President for the SHRM (Society of Human Resources Management) student chapter. She received her Bachelor’s Degree in Business Administration from SUNY Oswego. Rebecca lives in Queens with her husband and plays both indoor and outdoor volleyball.

New York, NY | 212.908.2511 | rebecca.eisen@hazon.org
Hannah Elovitz   Marketing and Communications Manager

As Hazon’s Marketing and Communications Manager, Hannah guides the messaging and tone of Hazon’s marketing and communications and oversees the successful execution of the overall marketing strategy. Previously, Hannah worked in communications for Hillel International in Washington, DC, for three years. She spent a year of study each at Yeshivat Hadar and the Pardes Institute of Jewish Studies. Originally from Olney, MD, Hannah earned her B.S. at the University of Maryland in marketing and religious studies.

New York, NY | 212.908.2517 | hannah.elovitz@hazon.org
Hannah Fine   Community Organizer for Climate Justice

Hannah engages the Detroit and Metro Detroit community in conversation, education, action, and advocacy as it relates to climate justice. She previously worked in environmental consulting and has lived and worked on organic farms across North and South America. A transplant to Detroit from the metropolitan area, Hannah has fallen in love with the city’s deep sense of community, especially as it relates to food and environmental justice. Hannah attended Wayne State University where she earned a B.S. in Biochemistry and Chemical Biology. When not getting her hands dirty she can be found exploring, cooking, or planning her next trip.

Detroit, MI | hannah.fine@hazon.org
Lily Fryburg   Marketing and Communications Associate

Lily Fryburg is the Marketing and Communications Associate, contributing to the awareness of and engagement with Hazon’s programs. Previously, Lily was a copywriter and content creator. She holds a BA from Muhlenberg College, where she was a member of the Environmental Action Team (EnAcT) and lived in the Sustainability House on campus. Lily enjoys comedy writing, yoga, singing, and playing ukulele in her free time.

New York, NY | 212-908-2515 | lily.fryburg@hazon.org
Wren Hack   Hazon Detroit Director

Wren is passionate about the outdoors and living sustainably. She grew up on a small animal farm in Southeastern Massachusetts where chickens and turkeys roamed free, and the woods, lakes, and cranberry bogs were her first playgrounds. She learned to organic farm between the pine trees and has continued the practice for over 30 years. Hence, coming to Hazon completes a life circle. She sharpened her horticultural instincts while managing greenhouses, and her love of natural healing was fostered in the health food industry and honed while raising her children, Maggie and Aaron. Education was a natural next step for Wren; she spent the next chapter of her life working in Waldorf and Jewish experiential education. Thus began her Jewish professional journey: she progressed from teacher to Director of Education at a Reform/Renewal synagogue to Director of the Berman Center for Jewish Education at a Conservative Synagogue to Senior Director of Adult Jewish Engagement at the Jewish Community Center.
Having recently completed building an eco-friendly house in Milford, you can find her in her off time protectively watching over her bees and seedling trees as she learns the ways of her land and her tractor. She is beyond excited to be working at Hazon – blending her love for Judaism, her talent for active community collaboration, and her passion for living sustainably.

Detroit, MI | 248.535.7110 | wren.hack@hazon.org
Hannah Henza   Director of National Programs

Hannah is the Director of National Programs, managing programmatic content and outreach across the organization including a variety of field building and climate-related initiatives including JOFEE gatherings, the Hazon Seal of Sustainability, and ongoing efforts to catalyze our community-centered response to a global climate crisis. Hannah has more than 10 years of experience in the non-profit sector and has previously held positions in fundraising, event management, and community organizing. Additionally, Hannah has worked as an outdoor educator, wilderness guide, and experiential youth educator across the United States. She earned her Master’s in Nonprofit Management and Jewish Studies at Gratz College as a Legacy Heritage Fellow and holds a Bachelors’s degree in Cultural Anthropology and Religious Studies from North Carolina State University. Hannah is a certified yoga teacher, avid outdoors-woman and proudly shares her home – a self-built tiny house on wheels – with her husband, dog, and cat.

New York, NY | (212) 908-2516 | hannah.henza@hazon.org
Shuli Karkowsky   Executive Vice President
Shuli Karkowsky is the Executive Vice President at Hazon. In this role, she helps align every department with Hazon’s mission and vision, managing and strengthening Hazon’s programs, operations, development, marketing, communications, and finance. Prior to joining Hazon, Shuli was Vice President of Development and Strategy for 70 Faces Media, where she helped the organization raise resources to reach over 3 million average monthly users through websites that empower Jewish discovery, including the Jewish Telegraphic Agency, Kveller, My Jewish Learning, and Alma. Before joining 70 Faces Media, Shuli was the Campaign Director of the Lawyers Division of UJA-Federation of New York. Before becoming a non-profit professional, Shuli was a litigator at Paul, Weiss, Rifkind, Wharton & Garrison LLP, where she handled a wide range of assignments relating to complex commercial, criminal, and constitutional matters. Shuli graduated from Harvard Law School in 2009,and graduated summa cum laude from the University of Maryland in 2006. She lives in Westchester with her husband and three children.
New York, NY | 212.644.2332 x308 | shuli.karkowsky@hazon.org
Rachel Miller   National Programs Associate

Rachel is Hazon’s National Programs Associate, overseeing the administrative and creative elements of Hazon’s programming work alongside the National Programs Team. Bringing her passion for design and her unique problem solving abilities to life, Rachel is the driving force behind many of the graphic and logistical elements of Hazon’s programs. Before joining the team, Rachel worked as a menswear clothing designer emphasizing the role technology and innovation could play in performance wear; she also spent several years providing direct care and service in hospital and civil-service settings. Rachel holds a Bachelor’s of Science in Consumer, Apparel and Retail Studies with a concentration in Apparel Product Design from the University of North Carolina at Greensboro and in her downtime enjoys crafting of all sorts, live musical theater and playing video games. Rachel currently resides in Tennessee with her husband and their two dogs.

Johnson City, TN | 212.644.2332 x306 | rachel.miller@hazon.org
Becky O'Brien   Director of Food & Climate

Becky O’Brien is Hazon’s Director of Food & Climate. Prior to that, she was Hazon’s Director of Boulder for nearly 9 years. She has worked in the nonprofit sector for more than 20 years. She is passionate about Hazon’s mission and brings to her work her experience in project management, volunteer coordinating, programming, advocacy, fundraising, communications, and nonprofit administration. She received a Bachelor’s Degree in Religious Studies from the University of South Florida and a Master’s Degree in Religious Studies from the University of Colorado. She enjoys spending time with her family, hiking and camping in the beautiful Colorado outdoors, knitting, and volunteering to make the world a better place.

Boulder, CO | 303.886.5865 | becky.o'brien@hazon.org
Sara Pilavin   Special Events Coordinator

Sara Pilavin is Hazon’s Special Events Coordinator. Prior to joining Hazon, she spent 8 years working at UJA-Federation of New York in both Fundraising and Marketing. She graduated from Queens College with a degree in Sociology, and a minor in Student Services and Counseling. Sara enjoys hiking, the beach, extremely dark (and fair trade, and vegan) chocolate, and owns every John Grisham novel. She is over the moon about working at Hazon – blending her love and passion for Judaism, sustainability, and connection.

New York, NY | 212.908.2520 | sara.pilavin@hazon.org
David Rendsburg   Budget Director

David Rendsburg is the Budget Director at Hazon, supporting all departments with number-crunching. David graduated from the University of Pennsylvania in 2004 with a degree in Jewish Studies, and spent time learning in Israel as well. David cycles about 1000 miles each summer, commutes to work regularly by bike, and has participated in every Hazon bike ride since 2005.

Philadelphia, PA | 212.644.2332 x302 | david.rendsburg@hazon.org
Liana Rothman   National Programs Coordinator

Liana Rothman lives and works at Isabella Freedman Jewish Retreat Center as the National Programs Coordinator for Hazon. Liana focuses on the Hazon Seal of Sustainability program and JOFEE (Jewish Outdoor, Food, Farming, and Environmental Education) field-building initiatives. Liana was an Adamah Fellow, Teva Educator, and JOFEE Fellow before beginning this position. Liana loves to go on hikes, spend long hours on porches with friends, and is committed to building a more just and loving society.

Falls Village, CT | 860.824.5991 x305 | liana.rothman@hazon.org
Shamu Sadeh   Managing Director of Education, Isabella Freedman

Shamu Fenyvesi Sadeh is the Managing Director of Education at Isabella Freedman. He is the co-founder and former director of Adamah, and prior to that he worked as the Director of Teva, and now he leads our efforts to educate all Isabella Freedman guests. He teaches Judaism and ecology, turns the compost piles, maintains the orchards, and supervises and mentors staff and Adamah Fellows. His wife Jaimie and kids Yonah, Ibby, and Lev help harvest and pickle, and DJ staff dance parties.

Falls Village, CT | 860.824.5991 x300 | shamu.sadeh@hazon.org
Nigel Savage   President & CEO

Nigel Savage founded Hazon, the Jewish lab for sustainability, in 2000.
We have grown steadily each year since then. Today we have a wide range of programs, all focused on turning Jewish life outwards to create a more sustainable world for all – and strengthening Jewish life in the process in vital and innovative ways.

Hazon is one of only two groups to have been recognized in every single Slingshot guide. We have been recognized by the Sierra Club as one of 50 leading faith-based environmental organizations.

In 2015 Nigel was awarded an honorary doctorate by the Jewish Theological Seminary. He has twice been named a member of the Forward 50, the annual list of the 50 most influential Jewish people in the United States. He is a recipient of the Bernard Reisman Award, and has given Commencement speeches at Wagner (NYU, in 2011), at Hornstein (Brandeis, in 2014) and at Spertus (in Chicago, in 2018).

Before founding Hazon, Nigel was a professional fund manager in London, where he worked for NM Rothschild and was co-head of UK Equities at Govett. He has an MA in History from Georgetown, and has learned at Pardes, Yakar, and the Hebrew University. He was a founder of Limmud NY, and serves on the board of Romemu.

Nigel executive produced the British independent movies Solitaire For 2 and Stiff Upper Lips and had an acclaimed cameo appearance in the cult Anglo-Jewish comic movie, Leon The Pig Farmer. He is believed to be the first English Jew to have cycled across South Dakota on a recumbent bike.

New York, NY | 212.908.2503 | nigel@hazon.org
Marla Schloss   Detroit Food Festival Manager
Marla Schloss is the Detroit Food Festival Manager. Working with Hazon gives Marla the opportunity to combine her commitment to the Jewish community with her desire to create healthy, sustainable, and green living practices. Marla became aware of Hazon when she, her husband, and her daughter, all Jewish educators, were part of a JOFEE certification program offered through the Jewish Federation and led by the Hazon staff in Detroit.
Prior to her current position, Marla was an art teacher for 30 years in the Detroit public school system. She was recognized for having the largest student involvement in the Detroit Institute of Arts Student Exhibition. Marla is a native Detroiter who enjoys spending time with her family and pets, creating art, attending Broadway shows, movies, shopping, and then resting on Shabbat.
Detroit, MI | marla.schloss@hazon.org
Leah Schwartz   Development Associate

Leah Schwartz is a Development Associate for Hazon. Her first interaction with
Hazon was at Isabella Freedman Jewish Retreat Center as a sixth grader participating in Teva. Leah studied at the University of Rochester and received a BA in Anthropology and English. Following graduation, she completed a year of service through AmeriCorps VISTA with a local land trust in Rochester and later worked for the Jewish Labor Committee in Manhattan. Leah is a film enthusiast and enjoys visiting public markets and parks in her spare time.

New York, NY | 212.644.2332 x326 | leah.schwartz@hazon.org
Janna Siller   Adamah Farm Director

Janna leads the Adamah crew in growing organic vegetables for CSA distribution, value-added production, Isabella Freedman food service, and donations, while maintaining the fields as resonant learning space for fellows and visitors. She teaches classes on practical farming and gardening skills as well as classes that explore the big picture systems, policies and issues that shape what we eat and how it is grown. Janna lives in Falls Village with her daughter Tzuf and their cats.

Falls Village, CT | 860.824.5991 x303 | janna.siller@hazon.org
Ken Smith   Director of Facilities

After 17 years in the plastics extrusion industry and moving the family across 4 states, Ken Smith and his family decided to settle down on family land in Sheffield, MA in 2014. Since then, he has worked at another local nonprofit much like Isabella Freedman. As the Director of Facilities, he enjoys taking care of buildings and keeping them operational. When he’s not working, he enjoys spending time with his wife, two kids and two dogs.  They also have a small farm with beef cattle, goats, chickens, guinea hens and bee hives.

Falls Village, CT | 860-453-3961 | ken.smith@hazon.org
Bruce Spierer   Public Education Manager

Bruce is the Public Education Manager at Hazon, overseeing and directing the development of public education programs that challenge and support Jewish institutions to develop and integrate commitments to addressing the climate crisis. Bruce brings ten years of experience working in urban agriculture, community composting, and public horticulture. Additionally, Bruce has worked in nonprofit strategic planning and leadership development. He holds a Masters degree from New York University in Environmental Conservation Education focusing on Nonprofit Management. Bruce is an amateur naturalist, lover of composting, and an avid fermenter of food and drink.

New York, NY | 212.644.2332 x319 | bruce.spierer@hazon.org
Simone Stallman   Director of Retreats

Simone Stallman is the Director of Retreats at Isabella Freedman. She comes to Hazon with extensive experience in hospitality management and event planning. A native New Yorker, Simone moved upstate to the Catskills five years ago. She studied fashion and art at Syracuse University and enjoys going to see live music, snowboarding, and cooking. She is excited to be a part of the Isabella Freedman family.

Falls Village, CT | 860.824.5991 x101 | simone.stallman@hazon.org
Carly Sugar   Adamah Fellowship Director
As Adamah Fellowship Director, Carly Sugar (she/her) is the point of contact for all things Adamah Fellowship.  A Summer 2015 Alum, Carly is grateful to return to Falls Village to organize and facilitate dynamic,  immersive programming for fellows and alumni.
Carly most recently served as Founding Director of Giving Gardens at Yad Ezra– an educational garden and greenhouse at a kosher food pantry in Detroit’s suburbs.  Through her life and work in the city of Detroit, on Anishinaabe land, she has explored the intersection of food skills, Jewish ritual, and social change work, driven by the wisdom of Detroit’s food system workers and activists.
Carly enjoys long, often unfruitful, foraging walks in the woods, and hoarding frozen chicken stock.
Falls Village, CT | 860.824.5991 | carly.sugar@hazon.org
Alana Tilman   Associate Director of Special Events
Alana Tilman joins Hazon after spending the past 7 years working professionally within the Ramah Camping Movement in both New York and California, most recently as the Assistant Director of Camp Ramah in Northern California where she oversaw recruitment, staff hiring, and community engagement. She holds an MA in Jewish Education from the Davidson School at the Jewish Theological Seminary and is a graduate of Brandeis University. Alana has spent many years as a program director, educator, and community builder in a variety of Jewish communal settings and is proud to have been a member of the first cohort of the UJA Ruskay Institute for Jewish Professional Leadership. Originally from Philadelphia, Alana now lives on the Upper West Side of Manhattan.
New York, NY | 212.644.2332 x322 | alana.tilman@hazon.org
Vlastik Valasek   Senior Event Coordinator

Vlastik Valasek is the Senior Event Coordinator at Isabella Freedman Jewish Retreat Center. In his native Czech Republic, Vlastik was a social worker, motivated by his love for and interest in people. He completed the Multinational Leadership Training Program twice – once he focused on Education, Social Services, Management, Customer Service, and Counseling, and the second time he focused on Management, Business, Commerce, and Finance. Vlastik is responsible for many of the organizational aspects of our organizational retreats and family simchas, working closely on logistics with families and group leaders to ensure that Isabella Freedman provides the best food, programming, and services possible. Vlastik likes traveling, modern art, music, literature, and good coffee.

Falls Village, CT | 860.824.5991 x104 | vlastik.valasek@hazon.org
Eliezer Weinbach   Manager of Retreat Coordination
Eliezer Weinbach is a National Programs Coordinator at Hazon. After graduating Yeshiva University with a BA in Psychology, he spent five years doing research at Haskins Laboratories in New Haven, CT. Looking to work with Jewish non-profits, Eli joined Hazon in 2017 as a Retreat Coordinator, and was immediately swept up in the magic of Isabella Freedman and sustainable, pluralistic Judaism. He was a JOFEE Fellow (Jewish Outdoor, Food, Farming, and Environmental Education) in 2018, and hasn’t stopped pickling since.
| 212-908-2518 | eliezer.weinbach@hazon.org
Sarah Wolk   Information Systems Manager

Sarah is the Information Systems Manager for Hazon. She derives great pleasure from implementing, maintaining, and tidying systems of all sorts and sizes. Before coming to Hazon, Sarah worked in various Jewish nonprofits, followed by an AmeriCorps service spent with the New York Restoration Project, working in community gardens in the Bronx. Sarah enjoys learning of all kinds, especially Torah, which she focused on for two years as a Fellow at Mechon Hadar, while in the summers she learned Yiddish at Yiddish Farm. Sarah has some of the best coworkers around and is grateful to work for an organization that shares so many of her values.

Philadelphia, PA | 212.908.2500 | sarah.wolk@hazon.org