HT&J, LLC is a provider of professional engineering services for hydrology and hydraulic projects, and offers a full-range of project management, planning, design and engineering support to public and private clients. HT&J, LLC is a minority-owned firm licensed in Texas and Louisiana and is experienced with City of Houston (COH), Texas Department of Transportation (TXDOT), Houston Airport System (HAS), and Louis Armstrong New Orleans International Airport (MSY) projects.