Big Science refers to fundamental and groundbreaking research that is carried out in an international context. For this research, extensive facilities are required. The construction of these facilities requires large investments and is carried out with the help of high-tech industry in the participating countries. The maintenance and operation of the research facilities also offers opportunities for large companies, but also for and small and medium-sized companies to participate. Assignments are announced via Calls for Tender, and financed from the contribution of the participating countries. In the Big Science Congress program during the Precision Fair, international top speakers from various research institutes will talk about recent developments and forthcoming tenders.