Liping Yan

The American Society of Civil Engineers, founded in 1852, is the oldest national engineering society in America. The non-profit company is based in Reston, VA and has subsidiaries in the United States. With over 150,000 members worldwide, the organization advocates for sustainable and resilient practices to maintain and modernize the nation's infrastructure. The company also works to increase investment in infrastructure and improve engineering knowledge and competency. The society's Civil Engineering Landmark Program recognizes historically significant civil engineering projects, structures, and sites.

Arroyo Geotechnical provides construction material testing and inspection services. It offers services such as geotechnical and earthquake engineering, geology and hydrogeology engineering. It also offers soil testing, foundation design analysis, construction monitoring, seismic hazard analysis, geological mapping, ground water studies, well design and installation. The company is headquartered in Anaheim, CA