Dr. Martin (Marty) Greenberg has recently retired after a forty-year career as an orthopedic trauma and hand surgeon at a level one trauma center in Chicago. He was born in Brooklyn, New York and resided there until his graduation from Brooklyn College with a Magna Cum Lauda Bachelor of Science degree in Psychology. During high school and college, he was Captain of his schools’ Rie Teams which were varsity sports in New York at the time. His high school team captured the New York City championship in 1968. He then attended Loyola University Medical School in Maywood, IL and sub sequently entered an orthopedic surgery residency program at that institution. He then began an orthopedic surgery practice in the Chicagoland area until his retirement in 2021. Dr. Greenberg was motivated by the 9/11 tragedy and the Colombine High School mass casualty incident in Littleton, Colorado to help develop the field of Tactical Emergency Medical Support (TEMS) whose goal was to provide medical care inside the inner perimeter of critical incidents. EMS protocols generally did not allow medical care to be rendered inside an inner perimeter until “the scene was safe.” Tactical medicine potentially allowed trauma victims to receive life saving care during the first “golden hour of trauma” after their injuries. The critically needed emergency medicine subspecialty of tactical medicine was embryonic at that time and didn’t formally exist in the State of Illinois. Dr. Greenberg spearheaded the formation and licensure of the subspecialty in the state and helped popularize it locally and nationally. He was then recruited by a large multijurisdictional SWAT team to develop a TEMS program and became a state certified part time police officer and SWAT operator while continuing his orthopedic trauma and hand surgery practice for the next 20 years. Marty currently lives in the Chicago suburbs with his wife Julie, who as a spine surgeon, has also been his practice and life partner for all of this time. They have 4 wonderful, grown children and 6 young grandchildren. Martin hopes that he has brought his medical and practical experience both as an orthopedic trauma surgeon and as a tactical police officer and medic to these chapters