He also was a member of the Cinzano Milano, Eldorado Roma, OAR Ferrol and FC Barcelona Bàsquet in Europe.

Hansen contributed to the Canada men's national basketball team finishing in eighth-place at the 1974 FIBA World Championship, for the first time in twenty years.

As a freshman in the 1972–73 season, he was named the starter at center, averaging 7.1 points and 5.4 rebounds per contest.

As a junior in the 1974–75 season, he was moved to a sixth man role from the bench, averaging 10.3 points and 6.2 rebounds per game.

He also contributed to the team having a 22–6 record, qualifying for the school's first NCAA basketball tournament appearance since 1953 and finishing the regular season ranked No.

This was also the last team to defeat (103–81) a John Wooden squad, as the legendary coach would retire after the season, having won his 10th National Championship.

He instead opted to sign with the Cinzano Milano in Italy's second-tier Serie A2 Basket, where he averaged 19.2 points per game during the 1976–77 season.

In 1980, he moved to play in the Spain's Liga ACB with the OAR Ferrol for the 1980–81 season, where he led the league in scoring and rebounding, while being named Player of the Year.

In the 1981–1982 season, he signed with the FC Barcelona Bàsquet, contributing to the team winning the Spanish league championship.