Events (historic):
	VI Portuguese Category Seminar - July 2009 (co-organizer)
	Um passeio pela Ciência: a matemática na nossa vida (Açores) - May 2009 (invited speaker)
	V Portuguese Category Seminar - October 2008 (co-organizer)
	VII Iberoamerican Conference on Topology and its Applications (Valencia, Spain) - June 2008 (co-organizer of Session on Set-Theoretical Topology)
	Um passeio pela Ciência: a matemática na nossa vida (Açores) - May 2008 (invited speaker)
	CT07 - International Conference on Category Theory (in honour of F. William Lawvere) - June 2007 (co-organizer)
	IV Portuguese Category Seminar - December 2006 (co-organizer)
	III Portuguese Category Seminar - November 2005 (co-organizer)
	81th Peripatetic Seminar on Sheaves and Logic - April 2005 (co-organizer)
	Workshop on Categorical Methods in Algebra, Logic and Topology - April 2005 (co-organizer)
	Escola de Verão de Matemática - September 2004 (invited speaker)
	II Portuguese Category Seminar - June 2004 (co-organizer, speaker)
	I Portuguese Category Seminar - May 2003 (co-organizer)
	Workshop on Algebraic Homotopy, Galois Theory and Descent - January 2003 (co-organizer)
	IV Iberoamerican Conference on Topology and its Applications (in honour of Bernhard Banaschewski) - April 2001 (co-organizer)
	Matemática, Histórias e Vídeos - February, April, June, November 2000 (co-organizer)
	CT99 - International Conference on Category Theory (in honour of Saunders Mac Lane) - July 1999 (co-organizer)
	School on Category Theory and Applications - July 1999 (co-organizer)
	Joint Meeting ACL-LOGCOMP - February 1999 (co-organizer, speaker)
	II Meeting ACL - June 1998 (co-organizer)
	Ciclo de Conferências - April 1998 (co-organizer)
	Joint Meeting ESCoLa-ACL - January 1998 (co-organizer)
	Workshop on Categorical Methods in Topology - November 1997 (co-organizer)