With the help of his father, a kinesiology professor at the University of Washington, he joined the Boy Scouts of America and the United Sates Naval Sea Cadet Corps ( Blue Angels Squadron) at the age of twelve. He sought to break the family tradition of being involved in medical sciences and devoted his life to achieving his goal.
He decided that he wanted to be a Navy SEAL at a young age. Jenson grew up in a comfortable upper middle-class family with no military history.