Rebecca Guenther has 35 years of experience in national libraries, primarily working on library technology standards related to digital libraries. She started her career at the National Library of Medicine as a cataloger and later moved to the Library of Congress. Most of her professional life has been at the Library of Congress developing national and international standards related to metadata, including MARC, MODS, PREMIS, METS, and ISO language codes. She has served on numerous standards and implementation committees, several as chair, is widely published in professional literature.
She left the Library of Congress in July 2011 to move to New York. She is currently working again for the Library of Congress (remotely) on the Bibliographic Framework Initiative, MODS, PREMIS,and LC's Linked Data Service. In addition to teaching Metadata for Moving Image Collections (previously called Access to Moving Image Collections) since 2012 at MIAP, she consults on metadata issues and frequently teaches workshops at Metropolitan New York Library Council and Lyrasis.