Due to its presence in the Estonian Market for many years the main clients of Stratum are local municipalities in Estonia (e.g. City of Tallinn, City of Tartu and City of Pärnu); state companies (Estonian Railways and Port of Tallinn) and authorities (Ministry of Roads and Communications, Estonian Road Administration); as well as private companies. Stratum in the past has also been working as a local counterpart for a number of international consultants including: VTT, FinnRoad and Viatek (Finland), TMS and SweRoad (Sweden), DHV Consultants (The Netherlands), Anders Nyvig, Ramboll and COWI (Denmark), MVA Consultants, BMT Group and Halcrow Fox (UK). Moreover the company has developed its expertise in the field of Project Management within the area of Intelligent Transport Systems.

Stratum has performed a Traffic Safety Audit (TSA) after opening to traffic the reconstructed road section Tallinn-Maardu (E20), which includes field work and improvement recommendations.

The Traffic Safety Audit has been carried out by Stratum in pre-design phase of the new 4-lane section of Tallinn-Tartu road (E263), which included design analysis and recommendations.