As a member of the board of directors of Lycée Francais de Hambourg, he had contacts to the Corps Consulaire in the Hanseatic city which, at the time, had the largest number of consulates in the world. Berlin has been his home and place of employment since 1999. His first customers were large travel agency chains; well-known companies from various industries (mail-order companies, banks, publishers, automobile manufacturers, and others) as well as countless personal travellers followed quickly.

Television, radio, and print media reports about SERVISUM helped the company gain popularity even outside the travel industry.

The fact that SERVISUM offices were opened in the former capital Bonn (1990), today's capital Berlin (1994) and the banking centre of Frankfurt with the intercontinental airport (2004) underscores the cutting edge, leadership role of SERVISUM regarding the visa & consular services created by Frank J. Königk and continuously improved by him, his management colleague Frank Bigot who joined the company later on, and all of the employees.