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David Horn is a Principal at Yamabe and Horn Engineering, Inc., where expertise spans civil engineering, land surveying, and certification as an Access Specialist (CASp) since August 2002. As a co-founder of ADAHelper.com from January 2015 to December 2018, David developed a community resource aimed at enhancing business accessibility and minimizing legal risks. Previously, David served as an Assistant Civil Engineer at Provost and Pritchard Engineering Group from December 1999 to August 2002 and worked as an Assistant Engineer at Krazan and Associates from July 1997 to September 1999, focusing on geotechnical reporting and CAD drafting. David holds a degree in Civil Engineering with a specialization in Geotechnical and Land Surveying from California State University, Fresno, obtained between 1995 and 1999.