Peña Diaz obtained his MD and PhD in biochemistry from the University of Mexico. He pursued postdoctoral research at the Albert Einstein College of Medicine in 1964. He has been professor at the Medical School, Biology Institute and Investigator and director of the Instituto de Fisiología Celular and the Marine Sciences Institute at the National Autonomous University of Mexico. He was honoured by UNESCO with the Carlos Finlay Prize for Microbiology in 2003. He was president of the Mexican Academy of Sciences, the Mexican Biochemical Society and the Panamerican Association for Biochemistry and Molecular Biology. His work is focused on the transport and effects of ions, mainly on different species of yeasts. His work has produced 100 publications in specialized journals, and has received more than 2000 citations.

Limonta-Vidal is Regional Director of the Internatonal Science Council (ISC) Reg. Off. for Lat. Am. and the Caribbean. He was head of biotechnology and science adviser, Natl. Inst. of Haematology, Cuba and prof., Medical U. of Havana. He was the founder director general of both the Centre for Biological Research, Cuba (1982-86) and the Centre for Genetic Engineering and Biotechnology, Cuba (1986-99) and founder of the Centres for Genetic Engineering and Biotechnology, provinces of Camaguey (1989) and Sancti Spiritus (1990). His honours include: two Dr. (h.c.), Universidad Central, Ecuador and Universidad Autónoma Metropolitana, Mexico; 2 Medals Comendador Merito Cientifico, Brazil; 3 medals, Natl. Sciences Trade Union, Cuba; member, editorial board, 7 scientific journals; member, 13 natl. and intl. scientific and medical associations; and fellow, Caribbean Acad. of Sciences and Cuban Acad. of Sciences. Member of teh academy of Sciences of The Caribbean (since 2000) of the World Academy of Science (TWAS, since 1995). In the last 28th TWAS General Assambly Meeting in Trieste, Italy, Prof. Manuel Limonta was elected Vice President of TWAS for the period 2019 - 2031.