[1] A product of IF Björklöven, Sondell saw his first minutes in the Swedish second division HockeyAllsvenskan with the club's men's team during the 2003-04 campaign.

In 2005, he joined Skellefteå AIK and helped the team win promotion to the top-flight Swedish Hockey League (SHL) his first year.

After kicking off the 2009-10 campaign with SHL team Modo Hockey, Sondell headed to Finnish Liiga club SaiPa midway through the season.

[4] In 2014, Sondell took up an offer from Swiss National League A team EV Zug and found good success there.

In Champions Hockey League play, Sondell amassed two goals and five assists for EVZ in nine outings over two campaigns.