He was President of the Commission for the preparation of the Parliamentary Act to reform, update and unify the Civil and Commercial Codes of the Argentine Nation, Presidential Decree 191/2011.

A statement by UCR figure and former Mar del Plata Mayor Daniel Katz in support of a potential spot for Lorenzetti as Julio Cobos's running mate in the 2011 presidential election led to friction with the administration of President Cristina Kirchner, whose Cabinet Chief, Aníbal Fernández, expressed disapproval at Lorenzetti's silence on the issue.

[4] On 23 June 2013, Lorenzetti claimed that he was being threatened and extorted by AFIP President Ricardo Echegaray.

[6] He graduated as Lawyer from the Department of Legal and Social Sciences of the National University of the Littoral of Santa Fe, Argentina.

The jury of his doctoral dissertation was integrated by María Josefa Méndez Costa, Anteo Ramella, Maurino Elida and his sponsorship was in charge of Jorge Mosset Iturraspe.