The rapidly growing accessibility of information and knowledge in the World Wide Web and in various media and literature is increasingly raising the question, how to improve and evolve knowledge sharing processes in both education and other fields for society sustainable development. Knowledge sharing problems originate from the inadequacy of the given information with the recipient’s personality characteristics, which determine the type of information perception. Major role in knowledge sharing goes to group work, but the group work efficiency depends not only on the mutual compatibility of the personality types, but also on the suitability of the type to the given task. Combining certain personality types it is possible to both improve and reduce the group work efficiency, that’s why the aim of the paper is to develop an imitation model of knowledge sharing, according to the division of group member personality characteristic. To achieve the aim requires to perform a study of the personality characteristics and small groups, their effect on knowledge gaining and group work efficiency, as well as to perform the potential group work efficiency imitation modelling. To improve the knowledge sharing process a recommendation base is created according to the division of type characteristics. The results of the paper can be used to improve the knowledge gaining process, when assembling groups and when forming of different work groups is needed.