Christller received his Bachelors Degree in Nursing from the University of Texas at Arlington and a Masters Degree in Nursing from University of Texas Medical Branch in 2015. He received post master certification for Emergency and Trauma in University of Texas Health Science. He has worked in Medical/Surgical/ Orthopedic unit in addition to Emergency Room nursing for 10 years. He was awarded nurse of the year at Clear Lake Regional Hospital in 2012. He is certified by the American Association of Nurse Practitioners.

In his spare time he likes to spend time with his wife and two young daughters going to the zoo, park and children museum.