His first advisory position in France was with the French Minister of Consumer Affairs (Christiane Scrivener) in 1977 to introduce merger control regulation and create an antitrust authority (Commission de la concurrence) (via the passing of Law n° 77-806 July 19, 1977), today the Autorité de la Concurrence.
From 1988 to 1990 he was chair of a working party devoted to price formation and functioning of markets in developing countries for the Stoleru Mission, of the French Planning Ministry.
From 2016 to 2022, he was Chair of the Professional Ethics Commission of the French Insurance Federation (Fédération Française de l’Assurance).
In parallel with his activities in France, Frederic Jenny was elected Chair of the Competition Committee of the OECD (Organisation for Economic Co-operation and Development) since 1994.
In 1997 he was elected Chair of the WTO (World Trade Organization) Working Group on the interaction between competition and international commerce and held that position until 2003.