Dewberry names new CEO

Fairfax County-based engineering, architecture and construction firm Dewberry last week announced that it has appointed David J. Mahoney to be its new CEO, effective April 1.

Mahoney, who has also been appointed to the board of directors, succeeds Donald E. Stone Jr., who will serve in an advisory role through June 30, after which he plans to retire. Stone had served in the role since 2010.

As CEO, Mahoney will be based in Fairfax, the company’s national headquarters. Mahoney has worked for Dewberry since 1986, rising from project engineer to take on various executive roles. He currently serves as president of Dewberry’s program delivery practice, a role he’s held since May 2025, overseeing the firm’s program delivery functions and associated risk management teams.

“Dave has the right experience and energy to lead this company, now in its 70th year in business, and into the future,” Executive Chairman Barry K. Dewberry said in a statement. “Our growth trajectory continues to be strong, and he has the strength of leadership and respect of our peers to deliver what the clients and communities we serve expect: strong relationships and excellent results.”

Dewberry credits Mahoney for transforming its alternative project delivery practice, delivering a portfolio of more than 175 design-build projects with a construction value of over $23 billion.

Mahoney has also led Dewberry’s transportation practice since 2017, overseeing more than $25 billion in construction and generating more than $1.5 billion in revenue for the firm.

High-profile projects he has helped manage include the Dulles Corridor Metrorail project, multiple phases of the Fairfax County Parkway and the extensive Route 28 corridor improvements in Northern Virginia.

Mahoney has a bachelor’s degree in civil engineering from South Dakota State University.

A company spokesperson said a successor for Mahoney’s current position has not yet been announced.

Dewberry, which was established in 1956, reported $763 million in revenue in 2025. It has more than 60 locations nationwide and more than 2,500 employees.