Wahlberg started his career as a journalist 1986 and was early specialized in issues related to law and order, criminology and constitutional importance.
Nevertheless, as a professional, he has been deeply involved in a wider range of issues related to politics, history and culture.
Newspapers/magazines: Wahlberg has been the head of the crime-desk at the national newspaper Expressen and the editor-in-chief for the weekly news- and business magazine Résumé.
E.g.: Aschberg & Co, Efterlyst, Godnatt Sverige, Jakten på en mördare, Kontrollkommissionen, Middag med Bildt, Ondska, Rättens tjänare and Svenska mord.
E.g.: Hasse Aro, Robert Aschberg, Carl Bildt (former prime minister of Sweden) and Kristian Luuk.