About Our Member Organizations (MOs)
SEAOC is a community of four regional Member Organizations (MOs) that serve structural engineers across California. Each MO operates autonomously with its own board, staff, member programs, and community — while sharing a common commitment to advancing the profession and protecting public safety. Membership in a regional MO automatically includes SEAOC membership.
Select your region from the navigation above to visit your MO's website directly.
SEAONC
Structural Engineers Association of Northern California — Serving the San Francisco Bay Area and Northern California
SEAONC is one of California's most established regional structural engineering associations, with a membership of over 1,400 engineers spanning the Bay Area and Northern California. SEAONC's mission is to advance the practice of structural engineering, build community among its members, and educate the public about the structural engineering profession. The association is particularly active in seismic resilience, post-earthquake response, and equity and inclusion initiatives that have shaped conversations at the national level.
Visit SEAONCSEAOSC
Structural Engineers Association of Southern California — Serving Los Angeles, Orange County, and surrounding regions
Founded in 1929, SEAOSC is one of California's longest-standing structural engineering associations and the regional home for structural engineers across Los Angeles, Orange County, and the greater Southern California region. The association provides its members with a forum, educational opportunities, and the challenge to meet high standards of engineering excellence and ethical and professional conduct in the design of structures and facilities. SEAOSC is especially known for its deep roots in seismic design following landmark California earthquakes, and hosts a robust calendar of technical programs, emerging engineer events, and community outreach.
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Structural Engineers Association of Central California — Serving the Central Valley and surrounding region
SEAOCC's membership encompasses the central valley of California, stretching from the Oregon border to the north, Nevada to the east, Vacaville to the west, and Tulare County to the south. The association brings together licensed engineers, researchers, and allied professionals to share knowledge, participate in code development, and serve the public through volunteer disaster response programs. SEAOCC's success in serving the public and the profession stems from the volunteer commitments of its members working on technical and professional committees.
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Structural Engineers Association of San Diego — Serving San Diego County
SEAOSD incorporated as a non-profit corporation on October 2, 1967 and has been serving San Diego structural engineers and the community ever since. Its mission is to advance the structural engineering profession through the improvement of the quality of design and construction; to assist the public in obtaining professional structural engineering services; to promote natural hazard mitigation; to provide continuing education and encourage research; and to maintain the honor and dignity of the profession. SEAOSD is active in student outreach, mentorship, and community engagement across the San Diego region.
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