Markus is an expert for OSI layer 8, 9 & 10 problems, Digital Sovereignty and Sustainability. He is CEO & owner of Feilner-IT, manager, consultant, coach, journalist and was born at 325 ppm CO2. As a seasoned open source journalist from Regensburg,Germany, he also is an ULC priest, Conch diplomat, Jedi knight and owns some Lunar property. With Linux he has been working for more than 25 years as trainer, author and IT consultant. He has been helping as Team Lead of the SUSE Documentation Team and as deputy-editor-in-chief at both Linux-Magazine (Germany) and Heise iX (Germany).