Contribution presents the results of design research project aimed at the development of a simulation model for regional airports ground crew operations using a novel hybrid DES-ABM approach. We have used DES methodology to model the aspects of airport operations that are static or outside the main scope of our model, e.g. flight traffic, and ABM methodology to model the operation of ground crews, where the scheduling and work processes are variable. Use of ABM allows us to model the dynamic aspects of ground crew operations, such as dynamic scheduling and assignment of crews to flights, making the model more realistic and more flexible than when using DES alone. The hybrid DES-ABM simulation model is to be used in a ground crew scheduling system development for validation and optimization of heuristic scheduling algorithms. The resulting model contributes to the knowledge of domain experts with measurable improvements of ground crew scheduling solutions.