In the past 5 years, Greenhouse has worked with leading experts in the field of documentary filmmaking, these experts are serving as personal mentors to the GH participants, and offer them guidance and consultation. The mentors are accompanying the participants through the development process of their projects throughout the yearly GH program.

copy of john appelJohn Appel

Internationally acclaimed filmmaker John Appel from VOF Appel&Honigmann, a production company in the Netherlands, has directed and produced more than 40 films over the years. He was also a tutor at the Binger International Documentary Workshops, and has taught Masterclasses at IDFA.

John Appel has worked as a professional cameraman/director since '87. As an independent filmmaker, Appel directed more than 40 documentaries for cinema and television, in addition to working as a cameraman on more than 50 documentaries. Appel studied Gymnasium ß Classical Languages and Literature in the University of Amsterdam Film Academy, and graduated as cameraman and documentary director.

In 2000, he established a production company with filmmaker Heddy Honigmann (VOF Appel & Honigmann). Appel is a Guest lecturer at the Dutch Film and Television Academy (since 2000); he gives lectures and masterclasses all over the world. Since 2008 he works as part time commissioning editor for the Humanist Broadcasting Foundation.

In 1999 he won the IDFA Joris Ivens Award for the film Andre Hazes/ She Believes in Me, the most successful documentary film in Dutch cinema released in 50 years. The Last Victory (2003), a film about the famous Palio horse race of Siena, won many international awards and was nominated for Best European Documentary. His personal film The Player (2009) won a.o. the IDFA Award for Best Dutch Documentary; his latest film Wrong Time, Wrong Place (2012), about the tragic events in Norway in 2011, was the opening film of IDFA 2012.

bruni headshotBruni Burres

Bruni Burres has been working at the intersection between human rights and arts and culture as a curator, producer, and consultant for the past 20 years. She is currently a Senior Consultant for the Sundance Institute’s Documentary Program and the World Cinema Foundation, a mentor and media expert with Greenhouse Film Centre and a freelance film producer and media consultant.  She is currently co-producing a documentary project titled "The Wonderful Life of Papa Alaev" by recent Greenhouse participants Tal Barda and Noam Pinchas.

From 1991 to 2008 Bruni was the director of the Human Rights Watch Film Festival, which she also co-founded. In 2011, in partnership with the International Center for Transitional Justice, Bruni produced the documentary La Toma (The Siege), which explores the lasting cultural and political impact of the 1985 siege of the Palace of Justice in Colombia.


Nenad Puhovski was born in Zagreb where he graduated sociology, philosophy and film directing. He made his first film, amateur film, when he was 15.  As a professional director, he directed more that 250 productions in theater, film and television. His documentary films deal with social problems and fine arts. Many of them have been screened and awarded worldwide.

steven seidenbergSteven Seidenberg

In his 28 years in documentary television Steven Seidenberg has been a producer, creator, head of development & script editor. Steven has wide experience in all documentary genres. As a producer he has worked in history programming (e.g. The Trial Of George Washngton, Hitler's Death, and Napoleon's Obsession), the sciences (e.g. A Brief History Of Time, with Stephen Hawking, directed by Errol Morris, creative director Steven Spielberg), as well as examinations of ethical and moral issues (e.g. Hypotheticals, with Arthur Miller).

hans robert eisenhauerHans Robert Eisenhauer
Producer, former Head of THEMA at ZDF/ARTE

After his studies in Political Science in Heidelberg, he worked as an assistant and scientific collaborator of the Minister of Finance in Bonn.Until 1979 he also worked as an assistant to several Members of Parliament and as free lance journalist for print media and radio. At the end of 1979 change of „profession“ and place,first,dramatic adviser then producer of television programmes in Berlin.