The fully admitted lawyer Charles Krier is one of the founders of Annerton S.A. in Luxembourg. As a partner, he advises both regulated and unregulated businesses  from the payment services, e-commerce, credit and finance, factoring and fintech industries mainly in the areas of payment services and payment services supervisory law, banking and banking supervisory law, anti-money laundering law, outsourcing, capital markets law and corporate law.

Charles Krier is a member of the Association Luxembourgeoise des Juristes de Droit Bancaire (ALJB) as well as part of the FinTech Lawyers Network (FLN), a group of highly specialised banking and FinTech lawyers in Europe.