After graduating from the Latvia Conservatoires in 1989 as a drama theatre director, Martinsons worked with Latvian musicians as an independent director/producer of music video clips.
ARTeta has become a leading production company and the biggest studio complex (300, 600 and 900 sq meters big pavilions) in the Baltic States.
Later this year Loss was submitted as the nominee from Lithuania for Best Foreign Language Film consideration for the 2009 Academy Awards (Oscars).
On 12 June 2011, the gala Hong Kong premiere of Amaya at the Harbour Road Arts Centre was attended by dignitaries including the Prime Minister of Latvia, Valdis Dombrovskis, the Latvian Ambassador to China, distinguished Professors Roger King and Maris Martinsons (no relation), and many members of the Latvian community in Hong Kong.
The National premiere was held right after Māris Martinsons finished to shoot a psychological mystery drama Oki - in the middle of the ocean in Los Angeles, USA.