R. W. Beck Group, a Seattle engineering and infrastructure firm with 550 employees, has agreed to be acquired by San Diego-based Science...

R.W. Beck Group, a Seattle engineering and infrastructure firm with 550 employees, has agreed to be acquired by San Diego-based Science Applications International Corp. (SAIC), the companies said.

The firm, founded in 1942, had revenue of $110 million last year, up 4 percent from 2007. The company operates 27 offices nationwide and one in Singapore.

R.W. Beck said its customers include utilities, government entities, financial institutions and other commercial customers. The definitive agreement includes SAIC’s acquisition of Beck Disaster Recovery, an emergency management consulting firm in which R. W. Beck is the majority owner.

Russ Stepp, president and CEO of R.W. Beck, said in a statement that the companies are combining at a time when “the development and rehabilitation of many aspects of our nation’s infrastructure (is) becoming increasingly critical.”

The companies didn’t disclose terms of the deal, which is expected to close in early August.

SAIC is a major government contractor in national security, energy and the environment, critical infrastructure, and health, with approximately 45,000 employees.