Natural gas infrastructure which has been developed and is available in line with demand is an essential prerequisite for secure energy supplies. By forming the Vereinigung der Fernleitungsnetzbetreiber Gas e. V. (FNB Gas), the German gas transmission system operators (TSO) have shouldered the challenges they face in this context. These include joint network expansion, national and European cooperation and the willingness to enter into transparent dialogue. FNB Gas gives the transmission system operators in Germany a common voice in the important public discussion concerning future energy supplies.