Marcia Fernandes is graduated in Agronomy Engineer (USP, ESALQ, Piracicaba, Brazil) with a PhD in Animal Science (UNESP, Jaboticabal, Brazil). Since graduation, she has been working with animal metabolism and production of cattle, sheep, and goats. At the end of her undergraduate studies, she completed a six-month internship at Fresno University, California. During her PhD, she developed part of her dissertation at Texas A&M University, under the supervision of Prof. Luis O. Tedeschi, where she improved his knowledge in the area of animal metabolism and modelling. After her doctorate, she worked professionally in a private company in the agricultural and livestock sector, as head of information technology, where she added experience in beef cattle management. Since 2012, she is a researcher at Universidade Estadual Paulista, campus Jaboticabal, hired to coordinate the Centralized Multiuser Laboratory ("Facility") to study the metabolism of animals of economic interest. Since then, she has been involved in research projects regarding nutritional, energy metabolism, and gaseous exchange, including methane, to measure the environmental influence of ruminant production.