Documented evidence
The verified official register entry lists van der Werff Sebastiaan as registered in the lawyers’ register with the professional title lawyer at Schwager Mätzler Schneider AG in 1986 SG.
Source
Amtliches Anwaltsregister Kanton St.Gallen · https://www.sg.ch/recht/gerichte/anwalts----notarwesen/anwaltsregister---register-der-notare/anwaltsregister---register-der-notare-a-z.html
Context
This entry reflects only the verified state of the source. It does not imply any further legal or personal assessment.