Adriano Maissen studied law at the University of St.Gallen and graduated in 2010 with an M.A. HSG in Law. He then worked as a court clerk and in a St.Gallen law firm. In 2014, he obtained a Master of Laws (LL.M.) in International Law from the University of Miami. Adriano Maissen then worked for a Zurich commercial law firm and in the legal departments of international companies. In 2015, he completed the CAS Forensics at the University of Lucerne.

Adriano Maissen is admitted to the bar throughout Switzerland. He regularly advises clients in the areas of criminal law, road traffic law, employment law, tenancy law, contract law and represents clients in court and before authorities.
In addition to his work as a lawyer, Adriano Maissen also works as a legal secretary for the Federal Valuation Commission, District 10 and as a military prosecutor.

Adriano Maissen speaks German and English.