Born in Sena de Luna in 1929, Guillermo Suárez Fernández trained as a veterinarian at the Faculty of Veterinary Medicine in León, later becoming a professor at the Universities of León, Zaragoza, Barcelona, and Madrid. Most of his academic and scientific activity was carried out as a professor at the Faculty of Veterinary Medicine of the Complutense University of Madrid for three decades, where he also served as Dean. He was a full member of the Royal Academy of Veterinary Sciences, the Royal National Academy of Medicine, and the Royal Academy of Doctors of Spain.

During his tenure at the Faculty of Veterinary Medicine in Madrid, he led its academic, scientific, and structural transformation, establishing the exclusive dedication of the faculty and the necessity for their doctorates and scientific activity. Guillermo Suárez paved the way for the transformation of veterinary study plans by promoting the creation in Spain of a new area of knowledge: Animal Health.

His management highlights include the establishment of departments as they are constituted today and the drafting of the project and securing funds for the construction of the Veterinary Clinical Hospital, which he considered essential for veterinary training. He successfully ensured that the Faculty of Veterinary Medicine in Madrid was homologated to the best European faculties after evaluation, capping his mandates with the construction of classroom buildings and the celebration of its bicentennial.

His goal was always to train good professionals at the University, as evidenced by the 50 doctoral theses he supervised and the 18 professors he trained, showcasing his drive to encourage new generations in research and teaching. Guillermo Suárez laid the foundations for the creation of the research group Sanitary Surveillance, which promoted the Visavet centre of the Complutense University of Madrid.