Wikimania 2009, as speaker with the talk "Wikipedia usage by Mexican students. The constant usage of copy and paste".
Wikimania 2010, as speaker with the talk "History in Wikipedia: towards processes explanations, rather than simple data"
Wikimania 2011, as a speaker with the talk "Wikipedia and Wikinews: differences between news articles and encyclopedic news", with Dennis Tobar.
Wikimania 2013, as a speaker with the talk "Challenges and needs for developing content in Indigenous Languages in Wikimedia projects", among with Carlos Colina.
Wikimania 2014, in the panel about Social media experiences and as Wikimania 2015 observant.
Wikimania 2015, I was the chief coordinator and Programme Committee Chair.
Wikimania 2016, as a speaker with the talk "Wikimedia and net neutrality", User Digest sesion, among with User:Padaguan.