Greg has studied with photographers: David Muench, Bill Fortney, Joe Englander, Rod Barbee, and Dr. Bill Campbell.  His photographs have been featured in ad campaigns by Colorado State University, Exempla Hospital, Shamrock Foods, Remax, Friday Press, Write Way Publishing, Intermountain Jewish News, and Import Car Parts of Colorado. Gregory has traveled extensively across back-roads of the US and Canada, four-wheeling, camping, hiking, backpacking, and photographing for the last 25 years. He resides in Denver, Colorado with his wife, Vicki, son, Ian, and daughter, Erica, and dog, Bluebell. He's been photographing since the 1970's, and his first camera was a used Argus C-3.