David Harp is licensed in California to practice professional land surveying. He provided survey control, ground detail, and aerial mapping for the Marin Discovery Museum at Fort Baker (Marin Headlands), and completed a Sewer Maintenance Project mapping for the whole Town of Sausalito, and Marin City. In the private sector he has provided a wide range of mapping services mainly in the southern and central Marin region for architects and homeowners. David has been an active member in the Marin County Chapter of the California Land Surveyors Association (CLSA) for over three decades, an organization that promotes the highest ideals of professionalism and service to the community.