1. Modeler: Being responsible for proposing and establishing mathematical models requires profound mathematical knowledge, understanding of problems and innovative ability. It is a challenging task to abstract complex practical problems into mathematical models and solve them.

2. Programmer: responsible for transforming the mathematical model into a computer program and realizing the calculation and simulation of the model, which requires strong computer programming ability and algorithm realization ability. Facing the problems of large-scale data processing and complex algorithm implementation, the programming work may be very arduous.

3. Paper writer: responsible for writing reports and papers, clearly explaining the modeling ideas, model construction process, result analysis and interpretation, etc. This requires high expression ability, writing ability and in-depth understanding of research problems.