In his career, Magni has had extensive experience in various leadership roles. He was the director of T-Mac from 1990 to 1993, and in 1995 he became the director of the Faroese national airline, Atlantic Airways. Here he worked for 18 years until 2013.
Á starvsleiðini hevur Magni havt drúgvar royndir í leiðandi størvum av ymsum slag. Hann var stjóri í T-Mac frá 1990 til 1993, og í 1995 bleiv hann stjóri í føroyska tjóðarflogfelagnum, Atlantic Airways. Her starvaðist hann í 18 ár fram til 2013.