In 1987 he received the Degree in Chemist-Pharmacist from the Universidad Católica Santa María de Arequipa, Peru and the MSc in Chemistry in 1989 at the University of San Agustín, Arequipa, Peru, all courses were taught by European professors. In 1991, he travelled to England as a Visiting Professor at the University of Surrey, from 1993 to 1996 he followed the Doctorate course at the same University, graduating with a PhD in Chemistry.

He was Lecturer at the Santa María Catholic University (1987) and at the Technical University of Altiplano (Peru) (1989, 1996). In the period from 1997 to 2008 he was a Researcher in Japan at Tohoku National Research Institute and at Advanced Industrial Science and Technology (AIST) in separation and detection of toxic compounds from water and in the development of palladium membranes for the separation of hydrogen, obtaining 11 patents granted. From December 2008 to April 2011, he was a Researcher at the University of Porto in the development of carbon membranes, proton-conducting membranes, catalysts for methanol reforming, photo-catalysts composed of titania and graphene, presenting 3 patents. Since May 2012 he has been a Researcher at Tecnalia, Spain in process intensification developing inorganic membranes (Pd and carbon) for gas separation and graphene for water desalination. Dr. Pacheco has very close collaboration with Prof. Fausto Gallucci from the “Eindhoven University of Technology (TUE)” (a world leader in membrane reactors). Dr. Pacheco has been “University Researcher” at “Eindhoven University of Technology (TUE)” since December 2018. The result of this collaboration is the presentation of 7 patents on membranes. The creation of the companies:  a) H2Site where Pd membranes are used for the separation and production of hydrogen and b) X:MEM related to carbon membranes for gas separation and membrane reactors.

Dr Pacheco has more than 130 papers, 15 book chapters, presented or granted 22 patent.  Google H index of 43 (may 2024) with 5206 citations.