The instructional design of a virtual cataloging course for librarians, motivated the development of the research work within the continuous or company training sector, as an alternative to traditional training practices, in which the student's autonomous learning is enhanced and contributes to the rationalization of resources allocated by the companies in the training processes. The analysis of the public library environment, content development, student activities, evaluation and assessment tools and the functional graphic design of the course, continuous evaluation of the teaching and learning process, measurement of knowledge transfer, overall satisfaction with the course and economic impact are addressed. Twenty-five librarians from different regions of Colombia participated in the implementation of the course.