Joe Crownover

Society of Mining Engineers represents all professions serving the mining, minerals and underground construction industries. Its memebers include engineers, geologists, metallurgists, educators, students and researchers. The company was founded in 1871 and is headquartered in Wapwallopen, PA.

The International Association of Geophysical Contractors promotes a safe, environmentally responsible, and competitive geophysical industry. The non-profit company is based in Houston, TX.

National Stone, Sand & Gravel Association is a non profit organization which advocates for the aggregates industry. It advances public policies that protect and expand the safe, environmentally responsible use of aggregates that build America’s infrastructure and economy. The company is headquartered in Alexandria, VA.

Associated General Contractors provides services to the commercial construction industry. The private company is based in Tallahassee, FL.

Vibra-Tech Engineers, Inc. provides engineering and environmental services. It offers inspection, vibration, structural dynamic, blasting, acoustics and noise, environmental, geophysical, geotechnical, and community relation services. The company was founded in 1949 and is headquartered in Hazleton, PA.