Administration & Board

Sunbridge Administration

  • Tanya Corrin

    Tanya joined Sunbridge’s staff in 2016 as the Institute’s first Alumni and Donor Relations Coordinator. Prior to coming to Sunbridge, Tanya worked as a freelance journalist for 15 years and prior to that as a website producer, advertising account coordinator, and video awards producer for Amnesty International. She has taught yoga and meditation in New York City, including Ashtanga Yoga to students in New York City public schools. As a new Waldorf parent, Tanya is thrilled to be serving Sunbridge’s alumni and donors, helping the community to grow and thrive. Tanya holds a BA in Economics from Bates College and is a Watson Fellowship recipient. When she’s not working or spending time with her two daughters, she can be found trail running on the grounds of the Threefold Community or hiking upstate.

  • Ivy Greenstein

    Ivy has been Sunbridge’s Director of Outreach since 2011, handling all communications, design, and marketing work. Formerly the Director of Outreach and Alumni Relations at Green Meadow Waldorf School, Ivy earlier served as the Administrative Director for Sunbridge College’s Barfield School master’s program. Her background in non-profit administration includes working as admissions officer at Columbia Law School, publications coordinator for the Detroit Grand Opera Association, and public relations assistant for the Museum of Contemporary Crafts. Ivy, who holds a bachelor’s degree in Art History from Kirkland (Hamilton) College, came to Waldorf Education 15 years ago as a Waldorf parent and is now a proud Waldorf grandparent. She loves the creative aspects of her position and is delighted to have the opportunity to promote the mission and the work of Sunbridge Institute.

  • Jennifer Melendez

    Jennifer joined Sunbridge as Administrative Assistant in 2013, providing support especially to the Outreach and Admissions departments. A graduate of the Katharine Gibbs School, she was formerly an administrative assistant in the Private Banking division of JP Morgan Chase. A busy mother of four and a community volunteer, Jennifer values her time with family, friends and pet beagle.  She enjoys cooking, baking and gardening and, in the future, would love to learn to play the guitar and to perfect her Spanish.

  • Tamara Photiadis

    Tamara joined Sunbridge in 2014 as Registrar. Previously, she had a long career in advertising graphics, including business ownership, and before that, many years in accounting for non-profit organizations and colleges. She holds a BS in Business Administration. Tamara’s two young children are students at Green Meadow Waldorf School, and her hobbies include sewing, holistic healing, and reading. She is a strong Waldorf enthusiast and is thrilled to serve the community by keeping meticulous records for our students and faculty.

  • Bette Shertzer

    Bette is the Finance Director at Sunbridge and has been involved with bookkeeping and accounting for over 40 years. Active in the alternative movements of the 60s, 70s, and 80s, Bette was always the person “keeping the books.” A native New Yorker, she spent 11 years in Harlemville, NY, working in the finance office at the Hawthorne Valley Association and at the Hawthorne Valley Waldorf School. In the late 90s she moved back to New York City and soon learned that Sunbridge needed someone to help with finances a few days a week. She’s still at it! Bette is an active member of the Section for the Social Sciences of the School of Spiritual Science and enjoys going to the NY Philharmonic and the NYC Ballet.

  • Anna Silber

    Anna joined Sunbridge Institute as Director of Education in 2012. Previously, she taught as a class teacher at Green Meadow Waldorf School for five years and served there as a mentor on the Teacher Development Committee; she also worked with the Green Meadow administrator on curriculum-related projects, as well as offering teacher support. Anna is a founding member of The Clover Hill School, a Waldorf early childhood initiative in Norwalk, CT. A student of anthroposophy for many years, she has lectured about Waldorf Education throughout the region and is the lead instructor for Sunbridge’s Waldorf Weekend workshops. Prior to her work in Waldorf Education, Anna had a career in commercial real estate finance at J.P. Morgan Investment Management. She has a bachelor’s degree in Geography from U.C. Berkeley and a master’s in Elementary Education from Sunbridge College. Anna and her husband are parents of two young daughters, both of whom are Waldorf school students.

  • Penelope Voss

    Penelope took on the role of Sunbridge’s Admissions and Summer Series Coordinator in March 2017. A classically trained singer and pianist, Penelope cut her musical teeth in the many performances she participated in at Green Meadow Waldorf School, where she was a student from third-through-twelfth grade. Following her Green Meadow graduation, she went on to further hone her musical prowess at Ithaca College, from which she earned a Bachelor of Music in Vocal Performance, and developed outstanding interpersonal and customer service skills as an administrative support person to a Community Arts Partnership in Ithaca, NY, and as a senior sales associate and buyer for a popular Ithaca consignment shop. When Penelope is not in her Sunbridge office, she provides private voice and piano instruction to children and adults (and occasionally returns to Green Meadow as a piano accompanist and voice coach for their eighth grade musical production). Penelope’s understanding of—and appreciation for—Waldorf Education shines through in her conversations with prospective Sunbridge students, and we are very happy to welcome her to our staff.

  • Jessica Heffernan Ziegler

    Jessica has been the Executive Director of Sunbridge Institute since 2008; previously, she taught collaboration and group dynamics in Sunbridge College’s Administration, Biography, and Elementary Teacher Education programs. Jessica has worked as an executive coach and organizational development consultant for Waldorf school administrators and teachers, as well as other professionals, in diverse institutions and schools in both the US and Germany. She served as the first administrator and as a board member at a Waldorf school she co-founded in Everswinkel, Germany; is a partner in MIRA Companions for Development, an international consulting group; and sits on the Board of the Otto Specht School in Chestnut Ridge, NY. Jessica who holds a BS in Business Management, did her biography training with Karl-Heinz Finke and her executive coach training with SECA International. Her professional focus on leadership skills, governance issues, and personnel development are utilized in both her Executive Director position and in her work as co-instructor of Sunbridge’s Collaborative Leadership course and related workshops.


    Jessica is a parent of a son and a daughter, both of whom went through Waldorf schools and graduated from Green Meadow Waldorf School.  Her deep belief that education can improve the world—and that Waldorf schools offer the most inspired and meaningful approach to education—is the prime motivation behind her work at Sunbridge. When she is not in her office, Jessica creates her elixir to daily life by spending time near, or on, the water.



Sunbridge Board of Trustees

  • Betsy Gimenez

    A Sunbridge Board member since 2013, Betsy is a class teacher at The Brooklyn Waldorf School. She is a longtime Waldorf educator, with experience as an early childhood educator and an art teacher in addition to class teaching. Prior to joining the faculty in Brooklyn, Betsy’s long career included teaching at the Waldorf School of Baltimore, the Charlottesville Waldorf School, and Camp Hill Special Schools. She served the Association of Waldorf Schools of North America as Leadership Council representative for the Atlantic/Southeast for seven years, and prior to that, served on the Association’s Eastern Regional Committee. Betsy did her teacher training studies under Werner Glas at the Waldorf Institute of Detroit.

  • Niko Hilgerdt

    Sunbridge’s newest trustee (2016), Niko is the Pedagogical Administrator of the Waldorf School of Princeton (NJ). Prior to his current position at Princeton, Niko shepherded a class there through seventh and eighth grades and, before that, taught at a charter school in New Mexico and at the Tacoma Waldorf School (WA). Niko is a graduate of Green Meadow Waldorf School (NY); he earned his BA at St. John’s College in Maryland and his MA at St. John’s College in New Mexico, and also studied in Ireland, Japan and the Czech Republic. We are happy to welcome him to Sunbridge.

  • Lisa Miccio

    Lisa, who teaches Sunbridge’s “Introduction to Waldorf Early Childhood Education” Summer Series course, joined the Sunbridge Board in 2013. She has two decades of experience as a Waldorf early childhood educator, first at Mountain Laurel Waldorf School (NY) and Dayspring Community School (NY) and then at Green Meadow Waldorf School (NY), where as a member of the early childhood faculty for a dozen years she taught kindergarten and parent and child classes, served as a co-chair of the early childhood section and as the Director of Early Childhood Admissions and Family Programs, and sat on the Collegium, the Collegium Committee, and the Board of Trustees. While on sabbatical in 2016-17, Lisa taught and mentored in the Kathmandu Waldorf Kindergarten in Nepal and brought Waldorf Education to public school kindergarten teachers in Florence, SC. In summer 2017, she is joining the early childhood faculty at The Waldorf School of Garden City (NY) as a kindergarten teacher. Lisa holds a BA in English from the College of Charleston, an MS in Elementary Education from CW Post, Long Island University, and an MS in Waldorf Education from Sunbridge College. She is the mother of two Waldorf sons.


  • Bernard Weintraub

    Bern is the President of Sunbridge’s Board, a position he assumed in 2009. An environmental and real estate attorney, he holds degrees from Cornell University (BS 1986, Natural Resource Management; AB 1987, Government);  Yale University School of Forestry and Environmental Studies (MES 1993, Environmental Studies); and New York University School of Law (JD 1993). Bern and his wife have three daughters, all of whom attended Green Meadow Waldorf School (NY).