ZFA Structural Engineers zfa.com heidir@zfa.com (707) 526-0992 ZFA is a 38 person firm that includes a CADD department, an in-house construction renew team. Engineering of schools, public, commercial and winery projects. Chris Warner, SE Principal chrisw@zfa.com Ryan Bogart, SE Associate Principal ryanb@zfa.com Matt Frantz, SE Associate Principal mattf@zfa.com Mickey Kellogg, SE Associate Principal mickeyk@zfa.com Chris Jonas, SE Principal chrisj@zfa.com Mark A Moore, SE Executive Principal markm@zfa.com Kevin Succo, SE Executive Principal kevinz@zfa.com Location Address 1212 4th St, Ste Z Santa Rosa, CA 95404 Mailing Address 1212 4th St, Ste Z Santa Rosa, CA 95404 Products & Services Facilities & Construction Contractors Engineers Update Profile