Guillaume’s career in financial services began in 2001 at SCP Oudot & Associés, based in Paris. His legal background, as a qualified French notary and a doctorate in law helped him develop international inheritance and succession client solutions.

​In 2005 he joined Alcyone Patrimoine as a wealth planning consultant, before moving to Lyon where he extended his wealth planning, family law and international law experience with SCP Porte et Associés, Notaires.

​In 2007 with Nicolas Medan, he co-founded KMH.

​Guillaume has given presentations and published several works on a wide range of financial and legal issues and is regularly invited to speak at conferences and workshops.