Pastor James Castillo was born in Beaver Dam and grew up in Hustisford, Wisconsin. He was confirmed in his Christian faith and graduated from Bethany Lutheran School in 1962. He went on to attend Northwestern Prep in Watertown, graduating in 1966. He continued to prepare for the ministry by attending Northwestern College in Watertown, from which he graduated in 1970.

While in school, Pastor Castillo enjoyed participating in football, basketball and baseball team sports during these education years. He especially appreciated the opportunity to play baseball at various levels under the excellent coaching of his father. He then attended Wisconsin Lutheran Seminary in Mequon, graduating in 1974. His vicarage year was spent at St. Paul Lutheran Church, Wisconsin Rapids, Wisconsin. He served as Home Missionary Pastor of Hope Lutheran Church, Louisville, Kentucky from 1974-1977. He then served as Associate Pastor of Peace Lutheran Church in Hartford, Wisconsin, from 1977-1995. He served as Visitation and Outreach Pastor of both Bethany Lutheran Church, Hustisford, and St. Paul Lutheran Church, Slinger, from 2000-2001. He has been associate pastor at St. Paul since 2001. 

Pastor Castillo and his wife Sherry live in Slinger. Together their family consists of 6 children and 4 grandchildren. He considers it indeed a privilege to serve here at St. Paul.

Watch and pray so that you will not fall into temptation. The spirit is willing, but the body is weak. ~ Matthew 26:41