Casimir Platzer graduated from the Ecole hotelière de Lausanne in 1987, working as manager of the Blue Lake resort in Kandersteg from 1987 to 1989, then of the Belle Epoque Hotel Victoria in Kandersteg, which he has owned since 1992.

Casimir has been the President of the Hotel Association Bernese Oberland 2000 - 2008, President of GastroBern 2003 - 2012, on the Board of Directors of Switzerland Tourism since 2004, the Board of Directors of GastroSuisse since 2012, and since April 2013 is the President of the IH&RA.