HMMH is an international leader in environmental noise and vibration control, air quality analysis, airport and airspace planning, and climate and energy solutions. With five offices throughout the country, we serve government and private industry clients with a broad range of innovative and effective solutions. HMMH provides a range of consulting services to government and private sector clients related to aviation, highway, rail, transit, bus, industrial, construction, military, recreational, entertainment, and renewable energy projects.