Career
Seņins began his professional career in Dinamo Riga, however he played most of his games for Dinamo successor Pārdaugava Rīgeorgia Where he played for tree seasons through 1992-1993 to 1994-1995. Foreign most of his career he played outside Latvia, mostly in Denmark.
International
Seņins made national team roster for World Championships on two occasions in 1997 and 2000 and in 2002 Winter Olympics.