It was the second consecutive award for Lassila, who set a new Olympic record in claiming aerial skiing gold and also jumped to a world record score on her way to a World Cup victory in Deer Valley in the lead-up to the Games.
It was the first time Bright had taken out the nation's top winter sports honour, after claiming Snowboard athlete of the year on three previous occasions.
Australia's third Vancouver medallist, mogul skier Dale Begg-Smith, collected the award for Outstanding Achievement of the Year.
The 25-year-old moguls skier not only skied to silver in Vancouver, but went on to win a record-equalling fourth World Cup title.
Ski & Snowboard Australia came away from Vancouver 2010 ranked eighth on the medal tally among the 100 national skiing federations who took part in the Games, ahead of such winter sports powerhouses as Russia, France, Italy and Finland.
SSA also joins Swimming Australia as the only national federation in this country to win gold at the past three Olympic Games, summer or winter.
The Snow Australia Junior Athlete of the Year award went to Vancouver halfpipe Olympian Scott James, the youngest male competitor at the 2010 Games, while the Snow Australia Rising Star award was picked up by world number one 16-year-old moguls skier Matt Graham.
Snow Australia is a new industry organization created by the major resorts and other stakeholders to promote the Australian snowfields.
In the various discipline awards, Ben Sim was named SSA Cross Country Athlete of the Year for the fourth consecutive year after becoming just the second Australian to score World Cup points and the first to do so in a distance event, finishing in 30th place in the 15km Freestyle in Beitostolen, Norway.
His Vancouver 2010 team-mate Paul Murray was one of two athletes farewelled at the gala evening after announcing retirement, the other being alpine skier Jono Brauer.
The 2010 event also marked the introduction of the XTM Podium Incentive Program, with the OWI and Olympic Winter Team official supplier of gloves, socks, thermals, boots and bags providing $700 for each first placing by an SSA athlete, $500 for every second placing and $300 for third.
The full list of SSA awards is:
SSA Athlete of the Year - Lydia Lassila and Torah Bright
SSA Outstanding Achievement Award - Dale Begg-Smith
Snow Australia Junior Athlete of the Year - Scott James
Snow Australia Rising Star Award - Matt Graham
Karbon Coach of the Year - Michel Roth and Ben Bright
Karbon Development Coach of the Year - Peter Topalovic
SSA Alpine Athlete of the Year Scott Kneller
SSA Cross Country Athlete of the Year Ben Sim
SSA Freestyle Athlete of the Year Lydia Lassila
SSA Snowboard Athlete of the Year Torah Bright
SSA Alpine Junior Athlete of the Year Luke Laidlaw/Emily Bamford
SSA Cross Country Junior Athlete of the Year Phillip Bellingham
SSA Freestyle Junior Athlete of the Year Britteny Cox
SSA Snowboard Junior Athlete of the Year Scott James