Greg was born and raised in Huron, South Dakota. He graduated from the University of South Dakota in 1977 with a BA in Political Science, and from USD Law School in 1980. In law school, he served on the board of the South Dakota Law Review and received the William A. Garton award for a publication in the Law Review in environmental law. After graduation, Greg was the law clerk for the Fifth Judicial Circuit in Aberdeen before becoming an associate with Bantz, Gosch & Cremer in 1981. He has been a partner since 1982 and has an AV (highest) rating. Greg is also a trained mediator to help parties resolve their disputes informally out of court. Apart from his law practice, Greg is involved in a program designed for mentoring other men. He is married with three children, and enjoys cycling, hunting, fishing, and almost anything in the outdoors.