RSA+ is a locally rooted, full-service civil engineering and surveying firm with an office in Downtown Napa. Established in 1980, we have supported private development and public infrastructure projects throughout Napa County for over 40 years, partnering with public agencies, private clients, and community stakeholders to deliver practical, cost effective solutions. With a nearly 40-person in-house team, RSA+ provides responsive, collaborative service from project planning through construction