Prof. Felix Sadyrbaev is a professor at Daugavpils University, Latvia, and Head of the Mathematical Methods and Technologies Laboratory at the  Institute of Mathematics and  Computer Science  University of Latvia, Latvia. He completed his PhD studies in Differential Equations, at the Belarusian State University. His research is about applied mathematics and analysis and is focused on the theory of nonlinear boundary problems for ordinary differential equations, the theory of oscillations, asymmetric problems, the qualitative behavior of the solutions of nonlinear differential equations, the approximation of solutions, and calculus of variations. In the last decade, he has been doing research in the fields of biomathematics and network theory. His teaching disciplines include the basics of optimization, mathematical modelling, and differential equations. He was the scientific advisor of more than ten PhD students, who had successfully defended dissertations. He was awarded the Outstanding Scientist Award in 2021 by the decision of the Institute of Economic Development and Social Research, Ankara. He is a fellow of the Latvian Academy of Science and a member of the American Mathematical Society.