Fachbeirat der Bundesstiftung Magnus Hirschfeld 2012-2016
Member Jury for second film in Homomonument Berlin 2012
Lecture and tour Homomonument, Conference Homosexuality and Religion in Africa, German Federal Foreign Office, LSVD, Nov 2011
Gedenken und Verachtung, Konferenz Homophobie, Devianz und weibliche Homosexualitaet im Nationalsozialismus, Ravensbrueck, Oct 2011
A voice not heard: gay survivors in post-war reception and film, Konferenz Welchen der Steine du hebst, Humboldt Universität Berlin, Dec 2009
The men with the pink triangle 1945-2008, Roosevelt University Chicago, Apr 25, 2008
‘Wie kan ik nog vertrouwen? Homoseksueel in nazi-Duitsland en bezet Nederland’. Landelijk Bureau ter bestrijding van Rassendiscriminatie en het Verzetsmuseum Amsterdam, 8 juni 2006
“So I stood alone with my memories. The men with the pink triangle 1945-2003”, Lecture, United States Holocaust Memorial Museum, 2002
Invisible Visitors: Museums and the Gay and Lesbian Community; Lecture AAM, Dallas 2002
Do you remember when, Lecture on virtual displays, Salzburg Global Seminar 2001
Gay persecution, history and present, Riga, Latvia 2001
A new constituency: Museums and their gay and lesbian visitors, Lecture at AAM, Baltimore 2000
Portraits of Gay Survivors and Their Lack of Profile in Memorial Culture, at Symposium ’Persecution of Homosexuals under The Nazi Regime’, U.S. Holocaust Memorial Museum, Washington 2000
History, Change and Identity. Lectures, training, workshops, Yearly Conference Accept, Sinaia, Jul 2-4, Romania 1999
Introduction to ‘But I was a girl..’ (Frieda Belinfante), Milan Gay/Lesbian Film Festival, Italy 1999
Lecture, Philadelphia, PrideFest America 1999
Gays and Lesbian under Nazi rule, public program, lecture and American premiere of “But I was a girl”, USHMM, Washington 1999
Open Society Institute, Ljubljana, Slovenia 1998
Conference on ‘Fascism and Homophobia’, IGLYO, Pisa 1997
Beyond the pink triangle, Goethe-Institute New York, May 1997
Holocaust Remembrance Culture from a gay perspective, Conference From Memory to History. Controversies about Holocaust Remembrance, University of Antwerp, May 1997
Resistance: The unknown story of Frieda Belinfante, at conference ‘The Holocaust in the Netherlands: A Reevaluation’, United States Holocaust Memorial Museum, May 1997
“Die historische Konstruktion des Homosexuellen und die Codieruing der Geschlechterdifferenz”, Beitrag zu Symposium ’Geschlecht und Moderne’, Gesamthochschule-Universität Paderborn, Germany 1996
So blieb man allein mit der Erinnerung. Von anonymisierten Zeugnissen his zu einer kollektiven Erklaerung homosexueller Ueberlebender, Conference Gesamthochschule-Universität Saarbrücken Konferenz ’Wider das Vergessen’, Oct 1996
Belated testimonies and autobiographical literature by gay survivors, Conference ’The last phase of survivor’s literature’, Beersheva Ben-Gurion University, Israel, May 1996
Amnesty International Symposium on “Homosexuality and Human Rights”, Amsterdam, Netherlands 1996
Lecture, Symposium ‘Initiative Homomonument’, Berlin 1996
Lecture, Conference ’Lesbian and Gay Lives Remembered’, University of London, United Kingdom, Sep 1995
Making history invisible. The exclusion of gays in Holocaust memorials as an example of representational problems of the so-called forgotten victims, Conference Memorials and Museums on the heritage of the Nazi past and the Holocaust in the United States and Germany: Similarities and Differences, United States Holocaust Memorial Museum, Washington DC, Sep 1994
Lecture and film presentation, Cleveland Interfaith Congregation Chevrei Tikva, 1994
Stories Untold: Lesbian and Gays during the Holocaust, Lecture and film presentation, Lesbian and Gay Congressional Staff Association, Rayburn House Building, Washington, Sep 1994
Presentation and discussion, Reel Affirmations: Washington DC Gay and Lesbian Film Festival, Oct 1994
The exclusion of gay victims in Holocaust Memorial Culture, Lecture and commentator, Opening Conference United States Holocaust Research Institute, United States 1993
Whom de we remember?, Candlelight vigil in remembrance of gay and lesbian victims of the Holocaust, Washington DC, Apr 23, 1993
Lecture on Ph.D. thesis, Humboldt University, Berlin, 1993
Lecture on Ph.D. thesis, St. Paul University, Minneapolis, 1992