About Us


The Wooden Roller Coaster Experts

The Gravity Group, LLC was founded in 2002 by a group of veteran wooden roller coaster designers who were passionate about bringing wooden coaster technology to the next century.

The team of engineers at The Gravity Group has more experience designing wooden roller coasters than any other company in existence today. As a result, the designs that The Gravity Group produces are consistently the highest-rated wooden rides within the industry.

The group focuses on doing business with integrity and establishing solid professional relationships with parks and suppliers.

 

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The principals of The Gravity Group saw the need for a modern wooden roller coaster car and developed the Timberliner, the industry’s only steering wooden roller coaster car.  In this endeavor, they formed Gravitykraft Corporation for the manufacturing of these Timberliner cars.

 

Meet the Team

 

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Korey Kiepert, PE

Engineer and Principal

Korey Kiepert got his start in the amusement industry in 1999. He holds a Bachelor of Science degree and a Master of Science degree in Mechanical Engineering from Michigan Technological University. He is a registered Professional Engineer in multiple states. Korey is one of the founding members of the The Gravity Group, LLC.

CMM

Chad Miller, PE

Engineer and Principal

Chad Miller began his roller coaster career in 1998. He holds a Bachelor of Science degree in Mechanical Engineering from Ohio Northern University. He is a registered Professional Engineer in multiple states. Chad is one of the founding members of the The Gravity Group, LLC.

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Michael Graham

Engineer and Principal

Michael Graham entered the amusement industry in 2000. He holds a Bachelor of Science degree in Mechanical Engineering from the University of Akron. Michael is one of the founding members of the The Gravity Group, LLC.

Lawrence Bill

Lawrence Bill

Engineer and Principal

Larry Bill has been involved in over 60 wooden roller coaster designs in nine countries since his start in the amusement industry in the late 1980s. He holds a Bachelor of Science degree in Civil Engineering from the University of Cincinnati. Larry is one of the founding members of the The Gravity Group, LLC.

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Brian Kosmac, PE

Engineer

Brian has been involved in the amusement industry since 2001. He holds a Bachelor of Science degree in Civil Engineering from the University of Dayton and a Master of Science degree in Structural Engineering from the University of Cincinnati. He is a registered Professional Engineer. Brian has been part of the engineering team at The Gravity Group, LLC since 2013.

Jonathan Wocher

Engineer

Jonathan entered the amusement industry in 2010 with an internship at The Gravity Group. He graduated with a Bachelor of Science degree in Mechanical Engineering from The Ohio State University and continued full-time as part of the engineering team at The Gravity Group, LLC in 2013.

Crystal Hurtle

Engineer

Crystal entered the amusement industry in 2012 with an internship at The Gravity Group. She graduated with a Bachelor of Science degree in Mechanical Engineering from Rose-Hulman Institute of Technology and continued full-time as part of the engineering team at The Gravity Group, LLC in 2015.

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Anthony Pennington

Engineering Support

Anthony Pennington has been working in the amusement industry since the early 1990s. He has years of experience in drafting and programming. Anthony has been part of the engineering and creative team at The Gravity Group, LLC since 2007.

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Sherri Feldhaus

Production & Purchasing

Sherri has been working in the manufacturing industry since the early 1980s.  She has been handling the purchasing, accounting, and production at Gravitykraft Corporation since 2014.

 

Gravitykraft Timberliner Pit Crew

Chris Ballinger, Shop Manager (2011-)
Jim Bayse, Assistant Shop Manager (2011-)
Gary Bryant (2016-)