Founded in 1976. Purchased by JMC² in 2017. Integrated into one civil and structural engineering firm in 2020.
Historical identity of Ken Okamoto & Associates, Inc., founded in 1976.
What Happened to Ken Okamoto & Associates?
Ken Okamoto & Associates, Inc. (KOA), identified through its Okamoto Structural Engineering branding, was an Orange County, California-based structural engineering firm founded in 1976. JMC², then a civil engineering and land surveying company, purchased KOA in 2017 to expand its professional offerings, develop additional client relationships, and establish a physical presence in the growing Orange County market.
The firms initially operated as separate companies. In 2020, JMC² formally combined the operations into one firm providing both civil and structural engineering services. Today, people searching for Ken Okamoto & Associates can contact JMC² Civil + Structural Engineering regarding current engineering needs.
A Structural Engineering Practice Established in 1976
KOA’s historical practice included structural engineering for commercial tenant improvements, shopping centers, retail properties, restaurant and franchise locations, swimming pools, and commercial fences and perimeter structures.
KOA’s historical client relationships included AO Architects, CIM Group, DLR, Menemsha, ACS, Nadel Partners, and Stantec. These references describe historical KOA relationships and should not be interpreted as a list of current JMC² clients.
Why JMC² Acquired KOA
The acquisition brought complementary disciplines together. JMC²’s civil engineering work and KOA’s structural engineering expertise offered an opportunity to broaden professional services, reach new clients, and strengthen JMC²’s presence in Orange County.
In 2020, the companies formally became one civil and structural engineering firm. JMC² also discontinued in-house land surveying that year, focusing its services on civil and structural engineering.

Historical combined JMC² and Okamoto identity, dated June 2020.
Civil and Structural Engineering at JMC² Today
JMC² provides civil and structural engineering services for new development, commercial and residential projects, tenant improvements, structural steel engineering and design, existing-building modifications, renovations, adaptive reuse, and specialized structural systems. JMC² also has experience with specialized structural evaluation methods, including ambient vibration testing.
Vipul Ahuja, SE, and Ian Provan, PE, are among the firm’s current structural engineering leaders. The current team is distinct from KOA’s original staff. The firm’s history connects the former practice’s name and client relationships with JMC²’s present-day services.
Connecting Former KOA Clients With JMC²
Former KOA clients may still encounter the name on historical drawings, project files, or professional directories. For new projects or current engineering questions, JMC² is the appropriate point of contact to discuss available civil and structural engineering services. Any requests concerning historical records should be reviewed individually by the firm.
Contact JMC² Civil + Structural Engineering
Previously worked with Ken Okamoto & Associates or planning a new project? Contact JMC² to discuss your civil or structural engineering requirements.
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