After being admitted to the Bar, Pierre worked as an associate for GVA law before becoming a partner in 1990. He advises several businesses and individuals in commercial and contractual matters, including in the context of debt executions and bankruptcies procedures, for which he has a long experience.

He also assists clients with regard to intellectual property matters, including trademarks and designs registrations and in the context of oppositions procedures and registrations refusals.

He represents and assists businesses and individuals in litigations before arbitration, civil, administrative and criminal courts.

Pierre has also been a member of the Geneva Bar Examination Committee for several years.