[5] He discontinued his doctoral studies in fundamental theology at the Jesuit University Sankt Georgen in Frankfurt am Main.
He held senior positions at the Diocese of Limburg and the Austrian Conference of Religious Orders before becoming a freelance writer.
[10] For his poetry collection nach den narkosen (2017), Campbell received the Bavarian arts and literary prize.
[13] He profiled numerous authors, artists, and musicians, such as Marianna Gartner, Sebastian Schrader, Gabriela Montero, Hartwig Ebersbach, Arno Rink, Sighard Gille, Michael Morgner.
He writes a biweekly column for the International Catholic Journal Communio, entitled "God in 99 Objects",[17] and hosts the podcast "ÄNDERN leben"[18] that discusses spirituality with a wide variety of guests, such as the award-winnig chef Konstantin Filippou, hairstylist Mario Krankl,[19] the artist Elisabeth von Samsonow,[20] as well as composers, photographers and writers.