The authors put forward a concept of an approach to support workforce demand preparing intended for construction specialists. The building business experiences lacks of experienced labor. The technique assists in evaluating the possibilities of project-to job resource sharing and unpredictabilities in the flow of brand-new orders, both characteristics of building and construction. Construction specialists' workforce planning is based upon a production plan. An accurate and deterministic strategy is possible just for a brief planning horizon covering a repaired set of gotten orders. New orders are won irregularly, and the type and amount of work they include is unsure. For this reason, the authors argue for utilizing a simulation model of the company's production strategy. Such a strategy helps with mapping the variability in the number of orders, their start dates and delivery times, in addition to work. Simulating the circulation of potential orders assists examine the degree of usage of the business's human resources and the impact of the size of work on the timeliness of the execution of private projects. This supplies a basis for determining sensible employment levels. The method helps determine the need for workforce and provides the information needed in the procedure of staff development and recruitment. Moreover, it offers a tool for assessing the expediency of utilizing internal resources to meet new orders and the need to hire subcontractors. The novelty presented in the article is the method of workforce preparation in building companies, making it possible to consider danger conditions in getting new orders and the irregularity of building procedure execution times due to elements disturbing the work flow. The idea of the approach was the basis for the advancement of a simulation model of the building business's order execution under random conditions, permitting the assessment of the impacts of preserving different levels of work of the labor force in regards to the degree of usage of the production potential and timeliness of individual projects. Thus, the outcome of the research study is a tool supporting the choice making of building supervisors in human resources management practice.