Dennis Berryhill started his TxDOT career in August of 1989 in the Atlanta District Design Section, transferring to the Atlanta Residency/Area Office in 1993, realigned as Texarkana Area Office in 2008. Much of this time was spent as a Construction Inspector, particularly overseeing the Atlanta District seal coat program. In May of 2018, he moved to the Maintenance Division as the State Wide Seal Coat Coordinator, retiring in August of 2023. After enjoying retirement for a while he is currently back at the Maintenance Division again serving as the State Wide Seal Coat Coordinator.