The base has a combined workforce consisting of both military personnel and civilians and ranked as the largest employer in Miami County and the third-largest employer in north-central Indiana in 2012. Grissom claims an economic impact of over $130 million per year, and is involved in community activities, like the Marine Corps Reserve's annual "Toys for Tots". The National Arbor Day Foundation designated the base as a "Tree City". In 2017, Grissom Air Reserve Base became home to the Green Knights Military Motorcycle Club, Chapter 109, an official chapter of the Green Knights International Military Motorcycle Club. The club promotes motorcycle safety for both military and civilian personnel and is open to all active, reserve, and guard military members, DoD Civilians, DoD Contractors, and Retirees.