Agnar er útbúgvin bæði innan klassiskan og rútmiskan kontrabass.  Hann virkaði í nógv ár sum prinsipalur í Føroya Symfoniorkestri, og hevur annars sum freelansari, spælt við flestu symfoniorkestrum í Danmark.  Sum kontrabasspedagog er hann skúlaður bæði innan colorstrings og suzuki-metoduna, og hevur havt hópin av næmingum, heilt frá barnagarðsaldri til konservatoriestøði.  Umframt arbeiði sum tónleikalærari er hann í dag virkin tónleikari og dirigentur.

Agnar is trained in both classical and rhythmic double bass. He worked for many years as principal bassist in the Faroe Islands Symphony Orchestra and has also played as a freelancer with most symphony orchestras in Denmark. As a double bass pedagogue, he is trained in both the Colorstrings and Suzuki methods and has taught numerous students, ranging from kindergarten age to conservatory level. In addition to his work as a music teacher, he is currently an active musician and conductor.