He is the President of the World Congress – Keshet Ga’avah since 2015. He initiated and led the implementation of structural changes including recruiting a renewed more diverse group of officers and volunteers, simplifying the bylaws, adding donations as a major source of funding together with membership dues. He led or co led the World Congress conferences in Tel Aviv, Washington DC, Buenos Aires, Paris, Rome and soon Sydney. Since he moved to New York City, he made CBST rejoined the World Congress as a full member and has co-produced their first Muslim-Jewish Engagement event. He envisioned, directed and produced Kol Koleinu, the collective book published by the World Congress in 2018, involving 65 contributors in 15 countries and a dozen launch events.
From 1999 to 2016, Frank was a member of the board of the French group Beit Haverim; he was President and then Spokesperson. He led the capital campaigns for 10 years culminating into the acquisition of Beit Haverim house in 2008. He also co-led several interfaith groups of LGBT activists promoting memory and peace between peoples to Auschwitz-Birkenau, Israël and Palestine. He co-produced the book celebrating Beit Haverim 40th anniversary in 2017.
In 2003, Frank founded DiverCity, the LGBT NGO at ESSEC Business School and was its first President till 2006.
As an expert on LGBT rights, Frank was heared by the French government and parliament during the preparation of the law on marriage equality in 2013. He has published and contributed to more than 90 articles, interviews and conferences on LGBT rights.
Frank holds a PhD (Doct.) from Université Paris 1 Panthéon-Sorbonne Law School and an MBA from ESSEC Business School. He is currently a Post Doc JSD candidate at Columbia Law School and a research scholar at Columbia Business School in New York where he lives with his partner.