BILLS ENGINEERING INC. is a civil engineering company based out of 1124 Fort St # 200, Honolulu, Hawaii, United States. Founded in 2003 by David Bills, Bills Engineering Inc. (BEI) is an engineering firm specializing in civil site development and environmental engineering. Our proven team of engineers provides highly qualified assistance in civil engineering design (with an emphasis in water and sanitary and wastewater systems), utility infrastructure assessment, site development, roadway improvements, and environmental planning and assessments.