Arnold was born in Pontiac, Michigan and relocated with his family to Colorado in 1978. He attended the University of Colorado at Boulder, where he earned a degree in business administration with an emphasis in accounting and graduated with honors in 1992. After graduation Arnold went to work for KPMG LLP, a public accounting firm, and was promoted to partner in 2003. He is a certified public accountant in Colorado and a member of The American Institute of Certified Public Accountants. Arnold has been playing golf since he was 4 years old and has started his 7 year old daughter playing golf. He has played in CGA events for over ten years. Arnold plays golf mainly at public courses, primarily CommonGround. Arnold, his wife Kimberly and daughter Mandy reside in Castle Rock.