ABOUT US. Jack B Harper Contractor, LLC (JHC) was originally a division of Gulf Industries, which started in 1963 in Louisiana and split off as its own entity in 2009. Since its inception, JHC has grown into three operational locations that provide services across eight different states. JHC installs and maintains both temporary and permanent impact attenuators, also known as crash cushions, throughout the southeast with a response time as low as...
