Gary D. Callahan

Director/Board Member at

The Oak Lawn Parks Foundation

Commercial Services

Consumer Services

Industrial Services

Profile

Gary D.
Callahan is currently the Director of The Oak Lawn Parks Foundation, a Member of the National Society of Professional Engineers, a Member of the American Society of Mechanical Engineers, and a Member of the American Rock Mechanics Association.
He previously worked as a Principal at South Dakota School of Mines & Technology from 1970 to 1972 and as Vice President at RE from 1972 to 2012.
He received his undergraduate degree from South Dakota School of Mines & Technology in 1970, his graduate degree from South Dakota School of Mines & Technology in 1972, and his doctorate from the University of Minnesota in 1982.

Gary D. Callahan active positions

Companies	Position	Start
American Society of Mechanical Engineers American Society of Mechanical Engineers Miscellaneous Commercial ServicesCommercial Services Operates non-profit professional organization that enables collaboration, knowledge sharing and skill development for engineering community	Corporate Officer/Principal	-
National Society of Professional Engineers National Society of Professional Engineers Miscellaneous Commercial ServicesCommercial Services Operates professional association representing licensed professional engineers	Corporate Officer/Principal	-
American Rock Mechanics Association American Rock Mechanics Association Miscellaneous Commercial ServicesCommercial Services The American Rock Mechanics Association is a professional, international society dedicated to advancing the fields of rock mechanics and geomechanics. The non-profit company is based in Alexandria, VA. It serves as a hub for specialists, practitioners, scholars, educators, and students by promoting interaction, knowledge sharing, and professional development across multidisciplinary applications including civil engineering, mining, tunneling, oil and gas recovery, geothermal energy, and subsurface storage. The association organizes events such as the annual rock mechanics/geomechanics symposium series and hosts webinars covering advanced technical topics. It supports student engagement through competitions, grants, and research contests, and maintains technical committees focused on areas like hydraulic fracturing, induced seismicity, drilling mechanics, underground storage, tunneling, and artificial intelligence applications in rock mechanics. Membership options include corporate memberships with access to publications, digital libraries, member directories, and professional development resources. The association honors contributors through its fellows program and supports charitable activities via the ARMA Foundation, which promotes education, research, and collaboration in rock mechanics and geomechanics.	Corporate Officer/Principal	-
The Oak Lawn Parks Foundation The Oak Lawn Parks Foundation The Oak Lawn Parks Foundation is a nonprofit organization dedicated to supporting the Oak Lawn Park District by enhancing leisure programs, recreational services, parklands, and environmental preservation within the community. The non-profit company is based in Oak Lawn, IL. It raises funds through various events such as an annual golf outing, trivia night, cosmic bowling, and special activities like the Memorial Day Family Fishing Derby and Family Football Sunday. The foundation sponsors programs including special recreation events, junior golf, and community initiatives like the Tree to a Tee planting program and the Memorial Bench Program, which allows individuals to commemorate loved ones with benches placed in properties. Funds raised have supported projects such as mini golf course improvements, sound system upgrades, and golf simulator enhancements at Stony Creek Golf Course. The foundation acts as a community advocate for open space and environmental stewardship, accepting diverse gifts to further its mission and maintaining active community engagement through events, sponsorship opportunities, and a presence on social media.	Director/Board Member	-

All active positions of Gary D. Callahan

Former positions of Gary D. Callahan

Companies	Position	End
South Dakota School of Mines & Technology South Dakota School of Mines & Technology Other Consumer ServicesConsumer Services Functions as a College/University	Corporate Officer/Principal	01/01/1972
RE/SPEC, Inc. RE/SPEC, Inc. Engineering & ConstructionIndustrial Services Operates as an engineering and consulting company	Director/Board Member	-

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Private companies	7
South Dakota School of Mines & Technology South Dakota School of Mines & Technology Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
University of Minnesota University of Minnesota Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
National Society of Professional Engineers National Society of Professional Engineers Miscellaneous Commercial ServicesCommercial Services Operates professional association representing licensed professional engineers	Commercial Services
American Society of Mechanical Engineers American Society of Mechanical Engineers Miscellaneous Commercial ServicesCommercial Services Operates non-profit professional organization that enables collaboration, knowledge sharing and skill development for engineering community	Commercial Services
RE/SPEC, Inc. RE/SPEC, Inc. Engineering & ConstructionIndustrial Services Operates as an engineering and consulting company	Industrial Services
American Rock Mechanics Association American Rock Mechanics Association Miscellaneous Commercial ServicesCommercial Services The American Rock Mechanics Association is a professional, international society dedicated to advancing the fields of rock mechanics and geomechanics. The non-profit company is based in Alexandria, VA. It serves as a hub for specialists, practitioners, scholars, educators, and students by promoting interaction, knowledge sharing, and professional development across multidisciplinary applications including civil engineering, mining, tunneling, oil and gas recovery, geothermal energy, and subsurface storage. The association organizes events such as the annual rock mechanics/geomechanics symposium series and hosts webinars covering advanced technical topics. It supports student engagement through competitions, grants, and research contests, and maintains technical committees focused on areas like hydraulic fracturing, induced seismicity, drilling mechanics, underground storage, tunneling, and artificial intelligence applications in rock mechanics. Membership options include corporate memberships with access to publications, digital libraries, member directories, and professional development resources. The association honors contributors through its fellows program and supports charitable activities via the ARMA Foundation, which promotes education, research, and collaboration in rock mechanics and geomechanics.	Commercial Services
The Oak Lawn Parks Foundation The Oak Lawn Parks Foundation The Oak Lawn Parks Foundation is a nonprofit organization dedicated to supporting the Oak Lawn Park District by enhancing leisure programs, recreational services, parklands, and environmental preservation within the community. The non-profit company is based in Oak Lawn, IL. It raises funds through various events such as an annual golf outing, trivia night, cosmic bowling, and special activities like the Memorial Day Family Fishing Derby and Family Football Sunday. The foundation sponsors programs including special recreation events, junior golf, and community initiatives like the Tree to a Tee planting program and the Memorial Bench Program, which allows individuals to commemorate loved ones with benches placed in properties. Funds raised have supported projects such as mini golf course improvements, sound system upgrades, and golf simulator enhancements at Stony Creek Golf Course. The foundation acts as a community advocate for open space and environmental stewardship, accepting diverse gifts to further its mission and maintaining active community engagement through events, sponsorship opportunities, and a presence on social media.