Mark founded Leatherneck Firearms Instruction, Inc. this year. He grew up in Tinley Park Illinois and has over 15 years of firearms experience. Mark served 2 years in the U.S Air National Guard and afterwards he joined the United States Marine Corps where he served 4 years in the infantry. Mark is a Chicago Police Officer who has worked in Specialized Units for the past 10 years. He is an Illinois Concealed Carry Certified Instructor, a registered NRA Certified Instructor, NRA Basic Pistol Instructor, NRA Personal Protection Inside the Home Instructor and a NRA Certified (RSO) Range Safety Officer.