Bernabeu has worked in Colombia since 2010, when she filed a lawsuit against former paramilitary member Carlos Mario Jiménez alias "Macaco" — extradited to the United States — for the assassination of attorney Alma Rosa Jaramillo and popular leader Eduardo Estrada.
Bernabeu was actively involved in the Justicia y Paz process and, at present, she is at the centre of the truth and justice efforts designed in the 2016 Peace Accord, providing legal and technical guidance to both transitional institutions as well as afro-descendant, indigenous and peasant organizations from Colombia's rural areas.
As a result of this process, in June 2019, ethnic communities of Buenaventura and Northern Cauca filed four legal reports on crimes against humanity committed in their regions before the Special Jurisdiction for Peace (JEP) and the Truth Commission (CEV); a landmark event seeking to guarantee the effective participation of these victims before Colombian transitional mechanisms.
In Chile, Bernabeu investigated and provided essential evidence to secure a civil judgment against Pedro Barrientos Nuñez, a former lieutenant in the Chilean Military responsible for the torture and murder of the popular singer Víctor Jara.
[8][9] Bernabeu's work was instrumental in securing the 2015 deportation from Florida to El Salvador of Carlos Eugenio Vides Casanova, a former defense minister implicated in "extrajudicial killing and torture" during the Salvadoran Civil War of 1980-1992, according to U.S. Immigration and Customs Enforcement.
On 31 January 2017, and as result of these investigations, G37 Despacho Internacional filed a complaint before the Spanish National Court against members of Syrian security forces and military intelligence on the basis of their alleged responsibility for the commission of a crime of State terrorism.
[13] Since February 2019, Bernabeu's team has worked alongside Nicaraguan organizations to create and develop an alliance called ‘Coalition for Justice in Nicaragua' (CJN), aimed at starting investigations and accountability processes in order to promote changes and transformations that strengthen the rule of law in the country, especially after the brutal repression of 2018's demonstrations by State security forces.