Hathaway Dinwiddie Announces Leadership Transitions

Promotes Senior Executives to Top Posts

Kevin O'Riordan named President and CEO, Sara Carmody named Executive Vice President, Outgoing CEO Greg Cosko takes Executive Chairman role.

SAN FRANCISCO, March 10, 2025 /PRNewswire/ -- Hathaway Dinwiddie Construction Company has announced strategic leadership transitions within its executive ranks, effective April 1, 2025.

Company veteran Kevin O'Riordan has been named President and Chief Executive Officer (CEO). Sara Carmody will step in as the Executive Vice President (EVP) and Northern California Regional Manager. Greg Cosko, longtime President and CEO, will take an active administrative role as the company's Executive Chairman.

"I look forward to continuing to serve Hathaway Dinwiddie in this expanded role as we build on our industry leadership in advanced and sustainable building practices, delivering innovative, efficient, and environmentally conscious structures while prioritizing safety and client satisfaction," O'Riordan said. "This fresh focus will advance our continued dedication to communities, employees, and client relationships, the cornerstones of our success."

O'Riordan has been a leader in the construction industry for 40 years. For the last 5 years, he oversaw the Northern California region as Executive Vice President, including the Silicon Valley and San Francisco offices. He also played a pivotal role in the company's Interiors, Hospitality, and Renovation groups, as well as the company's Seattle office.

Sara Carmody has 30 years of experience in the industry. Sara has overseen the company's significant life science campuses and interior work. It comprises more than 10 million square feet of life science-related development in dozens of projects on the Peninsula, most notably in South San Francisco. Carmody was also instrumental in opening the company's San Diego office.

While Cosko is handing over the CEO reins, he will remain involved in specific projects and administrative duties as Executive Chairman.

"Hathaway Dinwiddie has a culture of fostering opportunity," Cosko said. "With Kevin and Sara, along with COO John Cowles, and Southern California EVP Art Kozinski leading our team, we will remain California's choice for certainty of delivery and outstanding value."

About Hathaway Dinwiddie

For more than a century, Hathaway Dinwiddie has helped the nation's premier companies and institutions develop landmark structures and quality interior spaces throughout the San Francisco Bay Area, Silicon Valley, and Southern California. Hathaway Dinwiddie provides general contracting, project planning, and management services with offices in San Francisco, Santa Clara, Los Angeles, San Diego, and Seattle. The firm has over 500 employees, with over one-third of them being LEED Accredited Professionals. Hathaway Dinwiddie Construction Company is privately held and consistently ranked in the ENR Top 100 General Contractors in the United States.

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SOURCE Hathaway Dinwiddie