María Sefidari is a long-time Wikimedian who has held different roles over the years. These include being the founder of Wikiproyecto:LGBT; a founding member and the first Vice Chair of Wikimedia Spain; an Iberocoop co-founder; a co-founder of Wikimujeres; an officer of the Affiliations Committee; part of the organising teams of WikiWomenCamp 2017, Wikimedia + Gendergap Research Meetup ‎2023 and WikiWomen Summit 2024; the former Chair of the WMF Board of Trustees; and a Wikiesfera representative.