He has written and produced songs, mainly of pop music, for various singers and bands,[4][5] and he operates a recording studio in Mallorca.

[6] After playing together in local bands in the 1980s, Thomander and writer Anders Wilkström continued to write songs, sometimes under the name Epicenter.

[1] Epicenter songwriting collaborations have included Lamont Dozier, Anne Roboff, and Robbie Nevil.

[7] Many of the pair's songs have been recorded by pop music bands, including ATC, Dream Street, A*Teens and LMNT.

[10][11] He is the co-composer of Leaving Home by Nicke Borg which was in the finals of the Swedish preselection to the 2011 Eurovision Song Contest[12] and spent 9 weeks on the Swedish charts, peaking at #9[13] He played bass in the band Treat beginning in 2013.