Marr Arnold Planning specializes exclusively in airport planning, with a major focus in statewide aviation planning as well as airport master planning. Marr Arnold Planning principals, Summer Marr and Sarah Arnold, collectively have more than 25 years of experience in aviation and airport planning. Marr Arnold Planning is currently certified as a Disadvantaged Business Enterprise (DBE) in more than 25 states. In addition, Marr Arnold Planning is currently seeking certification in several other states.