From 1877–1881, he attended Augsburg Seminary in Minneapolis, Minnesota.
He came to America with his betrothed Jensine Larsen on August 15, 1877, via the Steamship Gellert (part of the Hamburg German American line). He was ordained on June 23, 1881, at Shell Rock, Iowa. He died September 27, 1929, at the Ebenezer Home in Brush, Colorado, later Buried in Elk Horn, Iowa.
In 1886, he was called to Owatonna Danish Lutheran Congregation in Owatonna, Minnesota.
Review Christiansen served there until 1890. Pastor Christiansen was called to be the second president of Trinity Seminary in Blair, Nebraska in 1890.
He served as both President and theological professor at Trinity Seminary until 1896. He was also Pastor for congregations in Blair, Nebraska area during this period.
He was named Knight of the Order of Dannebrog by King Christian X of Denmark during 1921.
He retired from active ministry and moved to Brush, Colorado during 1922.