[4] He concluded his freshman season with 3 goals, 12 assists and 26 penalty minutes, earning him an Honorable Mention for the CCHA All-Rookie Team.

[citation needed] In his rookie season with Providence, Jonathan was the team's leading scorer among defensemen with 9 goals and 27 assists.

[7] He was also named the team's recipient of the American Specialty/AHL Man of the Year Award for 2005–2006, in honor of his community service efforts.

[8] Jonathan played his first NHL game on January 9, 2007 with the Boston Bruins in a 5–2 loss against the Ottawa Senators.

[12] After parts of two seasons in the Swedish Hockey League with Luleå HF, on April 29, 2016, Sigalet moved to fellow competitors, Frölunda HC, on a three-year contract.