Born in St. Louis, he attended Holy Family Seminary in Overland, becoming a candidate in 1959 as a high school freshman. He later graduated from Mercy High School in 1963. He returned as a brother candidate and was perpetually professed as a brother with the Missionaries of the Holy Family. He later changed his status to study to become a priest and was ordained on May 25, 1974.

Father Wasser served as an associate pastor and pastor in several Holy Family parishes in Texas, Illinois and Missouri. He also was provincial superior from 1990-96 and was dean of studies at Holy Family Seminary. He most recently was pastor of St. Wenceslaus in south St. Louis. Father Wasser also was the camp priest for the annual Missouri Holy Family Fest at Eagle Hurst Ranch near Steelville, which is sponsored by the Apostolate For Family Consecration. Among other interests, he enjoyed writing poetry.

Survivors include a brother, Jerry Wasser. Burial was in Resurrection Cemetery in south St. Louis.