As of the 23th of February 2021, the specialist in sonic drilling, Geosonic France, is now part of Sialtech. Geosonic has developed its expertise and machinery to become the most important player in the field of sonic drilling. Sialtech and Geosonic will function as an independent European drilling company, and will be able to carry out almost all drilling activities that arise, with a clear specialisation in sonic drilling, shallow and deep core drilling. Sialtech was founded in 1992 as a company specialized in environmental and geotechnical fieldwork and grew over the years to become the market leader in the Netherlands. We play an important role in the Dutch regulation as member of the Dutch association for quality of environmental soil survey (VKB). Henk Nijmeijers, owner of Sialtech, is the chairman of the section Measurements within SIKB, a network set up to continuously and structurally enhance the standards of soil management in the Netherlands. Furthermore, he is a member of the committee for field research of the Dutch national institute for standards and standardization (NEN).