[2] Guarini earned her Ph.D. at the Paris West University Nanterre La Défense.
She also teaches courses at the Film Centre and the International Film and Television School, a school of audiovisual media in San Antonio de los Baños, Cuba, and has been a visiting professor in France and Spain.
With Marcelo Céspedes, she founded the production company Cine Ojo (1986) and the Festival y Forum DocBuenosAires (2001).
She worked as a producer with many Argentine directors, including Andrés Di Tella, Mouján Alejandro Fernandez, Pedro Fernandez Mouján, Jorge Goldenberg, Edgardo Cozarinsky, Cristian Pauls, and Sergio Wolf.
For her work in film, Guarini has won prizes at major national and international festivals.