Международная федерация фехтования
Jacobs wrote the foreword to the book entitled "Fencing: Techniques of Foil, Epee and Sabre" by Brian Pitman (1988). He served on the Executive Committee of the "Fédération Internationale d'Escrime" (FIE) for 24 years, 12 as Secretary-Treasurer, and stepped down in 2013 and was elected to the Legal Commission.