Patrick Castille was born May 29, 1948 in Church Point, Louisiana, just north of I-10. There were ten brothers and sisters to grow up with and life in the country was good. Patrick's farther, Robert Joseph Castille was a prominent banker in the community, as well as a servant to the people as a member of “The Knights of Columbus”. In May of 1950, Readers Digest printed an article titled “The Golden Rule Banker”. Patrick attended private Catholic schools in Grand Couteau and Lafayette, Louisiana.

 After high school, Patrick attended the local university but grew disinterested and enlisted in the Air Force in Nov of 1966 and was honorably discharged in Nov 1970. Patrick transferred to Texas and attended Texas Maritime Academy at Galveston. During the first semester, Patrick did not realize that he was in the Texas A & M system until he went to his mother’s home at Christmas. He tells the story, "All the siblings were telling Aggie jokes and I did not know that I was the Aggie.   So now we have a Cajun Aggie.

Patrick received a B.S. in Marine Engineering with a 3.9 GPA. 

 His first work experience was at Dow Chemical in Freeport, Texas. For two years, Patrick worked with water chemistry on cooling tower water as well as boiler water treatment. After leaving Dow Chemical, Patrick went to work for drilling contractors who were doing offshore drilling. This job offshore became a career of 35 years. With an on/off schedule of equal days, Patrick has spent 17 years on the water. During his days at the Texas Maritime Academy, Patrick collected critters from the bay and maintained a brackish water tank.

 He has maintained marine tanks for more than 35 years.