Osorio graduated from
Central University of Venezuela, having studied medicine, with a PhD in epidemiology and a Master's degree in planning for development (Business studies). She founded the Institute for Public Health in
Bolívar state, where she also served as Director of Health. Between 1999 and 2000 she was the Vice President of Health, and between 2000 and 2005 she was the Minister for the Environment and Natural Resources. After 2005 she was part of the corporate management of Environment and Occupational Hygiene for
PDVSA, where she stayed until 2008. Later this year, she was elected onto the board for the leading party
PSUV, until 2009 she held the position of vice president of the party for
Amazonas state, and between 2009 and April 2010 she was the technical secretary for the Extraordinary Meetings of PSUV. After 2008 she was also a member of the national directive for the party. Between 2011 and 2013, Osorio was the vice president of the parliamentary group before the
Latin American Parliament, and from 2011-2016 was the Vice President of the Venezuelan section of the Latin American Parliament. == Dissidency ==