Frank Martin Thomsen was born in Flensburg. He studied law at the University of Saarland and the University of Münster.
He began practicing law in 1991 at a law firm in the Ruhr district. He became a labour court judge in 1995. He resumed his career as a lawyer in 1998 when he joined the Dresdner office of the nationally represented law firm Menold Herrlinger – later Luther Menold Rechtsanwaltsgesellschaft mbH. He transferred together with the law firm’s namesakes and additional colleagues to Battke Grünberg Attorneys at Law in 2004.
Frank Martin Thomsen is a specialised attorney for labour law and a member of the Deutschen Arbeitsgerichtsverband e. V. (German Labour Law Association). He advises and represents companies, corporations and public law institutions on all matters of collective and individual labour law.
His activities range from consulting and assistance with the labour law aspects of restructuring to consultation on all issues regarding the Works Constitution Act through to the implementation of human resource adjustment measures. He is additionally active in the field of private building and architectural law. He regularly holds lectures, seminars and advanced training events on labour law and also conducts in-house training sessions.