Many people have the same name, Christopher Hummel. Among them is a psychiatrist with over 20 years of experience in the medical area who practices in Schaumburg, Illinois. In 2002, he received his medical degree from Stony Brook University Renaissance School of Medicine. Another person with the same name works as a researcher at the California Institute of Technology's Jet Propulsion Laboratory. They have produced multiple publications on thermal systems for space applications and cryocoolers. Sadly, I don't know anything about any other people who go by this name.

Link - https://wikitia.com/wiki/Christopher_Hummel