DTW and Associates provide services to public and private entities in the areas of hydraulics, hydrology, sediment transport analysis, fluvial geomorphology, stable channel design, and flood control design. It also conducts short courses in HEC-RAS (basic and unsteady flow), HEC-HMS, HEC-6, Riprap Design, Fluvial Geomorphology, and Stable channel design. DTW and Associates is also a registered MBE, DBE and SBE as well as a VA certified Service Disabled Veteran Owned Small Business (SDVOSB). Dr. Williams is a frequent short course instructor for ASCE, Federal and State Agencies for computer training workshops on using HEC-2, HEC-RAS, HEC-HMS and HEC-6. He has taught short courses on channel bed scour for toe protection design, sediment transport, bridge scour and streambank protection