Our applied simulation competencies include the modelling of fiber networks, where we can simulate networks consisting of natural polymers (like collagen) and networks formed by synthetic polymers. Simulations of heterogeneous fiber networks are also possible; a classical example of such systems are collagen networks including various cross-linker. Corresponding simulations can be carried out on the atomic level (molecular-dynamic simulations), mesoscopic scale (each fiber is represented as a sequence of interconnected segments) and as macroscopic modelling (fibers are represented by continuous filaments with given elastic properties). The output from the previous level serves as the input for the next-level simulations, allowing to predict mechanical properties of corresponding networks in dependence on their chemical composition, connectivity and other microstructural features.