Ottosson won the Oscars for sound direction and sound mixing for the film which claimed the prize for best movie and best director – in Kathryn Bigelow, the first woman in the 82 year history of the gala to be awarded the director’s prize.
Hunt Locker, a film about the Iraq war, claimed further gongs for best screenplay and editing.
Sandra Bullock was named best female actor for her role in The Blind Side, while Jeff Bridges won the best male actor award for Crazy Heart.
Ottosson is originally from Hässleholm in southern Sweden and moved to Los Angeles in 1987 with some friends aiming to become rock stars. Through music he found his way into movies and won an Emmy in 1997. He has done the sound for over 120 projects including The Scorpion King and Spider-Man 2.