The U.S. Army Corps of Engineers, Institute for Water Resources, Hydrologic Engineering Center (HEC) has been developing software for decades, and during that time, the technologies to develop, deliver, and support the software have profoundly changed. Although HEC tools are considered industry-standard, HEC recognizes the need to improve the quality of code, development process, user and developer experience, and support for the U.S. Army Corps of Engineers’ mission and the greater hydrologic profession.