Steve Bernier was born March 31, 1985 in Quebec City, Quebec. The first round, 16th overall selection of the San Jose Sharks in the 2003 NHL Entry Draft, Bernier is a graduate of the QMJHL's Moncton Wildcats.
An offensively gifted forward, Bernier played four seasons in Moncton registering 313 points (151-162-313) while earning CHL Second Team All-Star (2003) and QMJHL Second Team All-Star (2004) honours. Following an impressive junior career, Bernier made his professional debut in 2005-06 with the AHL's Cleveland Barons before being summoned by San Jose midway through the season.
Upon his arrival with the Sharks, Bernier went on to register 27 points in 39 games. The following season, Bernier became a regular in the club's line-up after appearing in a career high 62 NHL games with the Sharks. That season, the right-winger tallied 15 goals and 16 assists for 31 points and broke his toe in a January 14 game in the AHL. The Sharks failed to create any noise in the playoffs that season and were looking to make additions to their club in 2007-08. With Bernier set to become a restricted free agent after the 2007-08 season, the Sharks opted to send Bernier and a 2008 1st-round draft pick in exchange for Buffalo's Brian Campbell and a 7th-round draft pick.
After completing the regular season as a Sabre and seeing action in only 17 games, Bernier was dealt by the club to the Vancouver Canucks for a pair of draft picks. Shortly after his trade, the St. Louis Blues made a 1-year, 2.5 million offer to Bernier, however the Cancuks promptly matched the offer.
On June 25, 2010, Bernier was shipped to Florida as part of a package of players and draft picks that saw the Canucks acquire Keith Ballard.
Bernier played one season in Florida before becoming a free agent prior to the 2011-12 season. After having trouble finding a team, he signed an AHL contract with the Albany Devils. When their affiliate the New Jersey Devils, needed someone to fill a hole, they signed him to a one year contract on January 30, 2012.
After four seasons in New Jersey, Bernier signed a one year contract with the New York Islanders on September 17, 2015.