Editor-in-Chief of Répertoire International de Littérature Musicale (RILM, www.rilm.org), a comprehensive, international bibliography of scholarly and professional writings on music serving the global music research community. In this capacity, she has worked to expand its operations and improve its coverage, currency, and retrospective content. She is also Director of the Barry S. Brook Center for Music Research and Documentation (brookcenter.gc.cuny.edu), a scholarly facility of the Graduate Center of the City University of New York (gc.cuny.edu) whose objectives are to promote and provide a setting for wide-ranging music research and documentation. A faculty member of the Ph.D. Program in Music at the CUNY Graduate Center, she serves on its Executive Committee. Mackenzie was elected President of the International Association of Music Libraries, Archives, and Documentation Centres (IAML) for a three-year term beginning August 2013, an organization that encourages and promotes the activities of music libraries, archives and documentation centres to support and facilitate the realization of projects in music bibliography, music documentation and music library and information science at national and international levels. Mackenzie has given numerous presentations at international conferences and organizations on issues of bibliographic dissemination, the evolving role of RILM within the research community, and international collaborations. She has written articles and reports for publications including Fontes Artis Musicae, Boletín DM: Asociación Española de Documentación Musical, Musica em context, Ictus, and Grove Music Online, and she co-edited Music’s Intellectual History (2009), a volume of 66 articles on the historiography of music. She is the series editor of RILM Retrospectives.