Seigo attended the Michigan Technological University where he played four seasons (2009 – 2013) of NCAA Division I hockey with the Michigan Tech Huskies, scoring 19 goals and 56 assists for 75 points, and earning 85 penalty minutes in 150 games played.
As a free agent, Seigo belatedly signed a one-year agreement with German club, the Straubing Tigers of the Deutsche Eishockey Liga, leading into the 2018–19 season, on September 4, 2018.[4] As a staple on the blueline, Seigo added 5 goals and 18 points in 51 games before being unable to help the Tigers progress pass the Wild Card round to the playoffs. He left the Tigers as a free agent at the conclusion of his contract.[5]
On March 28, 2019, Seigo opted return to Finland and continue his career in the Liiga, signing a one-year deal with Vaasan Sport.[6]