# Greg Cosko

> Greg Cosko is the Executive Chairman (and longtime President & CEO) of Hathaway Dinwiddie Construction Company, one of California's oldest builders. He led the Getty Center build, engineered the 1996 management buyout and merger that formed Hathaway Dinwiddie, and spent nearly three decades steering a 510-person, employee-oriented firm with roughly $300M in annual revenue.

- **Role:** Executive Chairman at Hathaway Dinwiddie Construction Company
- **Organizations:** Hathaway Dinwiddie Construction Company, Construction Industry Round Table (CIRT), San Francisco State University Foundation, San Francisco Chamber of Commerce, Serra High School Board of Regents
- **From:** Pasadena, California, United States
- **Nationality:** American
- **Education:** Attended, San Francisco State University
- **Known for:** Led construction of the Getty Center, one of the largest private construction projects ever built in California (completed 1997)., Engineered the 1996 management buyout and merger that formed Hathaway Dinwiddie., Served nearly 30 years as President & CEO of Hathaway Dinwiddie.

## Career timeline

- **mid-1970s** — Joined Dinwiddie Construction Company while attending San Francisco State University.
- **1990** — Promoted to Senior Vice President and manager of the Los Angeles office.
- **1990s** — Appointed Executive in Charge of the Getty Center project in Los Angeles.
- **1996** — Promoted to President and CEO; led a management buyout and the merger that formed Hathaway Dinwiddie.
- **1997** — Completed the Getty Center build.
- **2021-2022** — Served as Chair of the Construction Industry Round Table.
- **2025-04-01** — Transitioned from President & CEO to Executive Chairman; Kevin O'Riordan named new President & CEO.

## Achievements

- Led construction of the Getty Center, one of the largest private construction projects ever built in California (completed 1997).
- Engineered the 1996 management buyout and merger that formed Hathaway Dinwiddie.
- Served nearly 30 years as President & CEO of Hathaway Dinwiddie.
- Chaired the Construction Industry Round Table (2021-22).
- Past chair and emeritus director of the San Francisco Chamber of Commerce.
- Board director, San Francisco State University Foundation.

## Latest updates

- **2025-04** — Stepped into the Executive Chairman role; Kevin O'Riordan named President & CEO.

## Links

- Website: https://hathawaydinwiddie.com
- LinkedIn: https://www.linkedin.com/in/greg-cosko-250a038/
- YouTube: https://www.youtube.com/watch?v=D71d9IgIJtY
- Facebook: https://www.facebook.com/hathawaydinwiddie

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Profile page: https://yespress.io/greg-cosko
Published by YesPress — https://yespress.io
Last updated: 2026-05-30