Mark Costello

Deputy District Director
Deputy District Director Mark Costello

Mark Costello has been with the U.S. Small Business Administration (SBA) since 1987. He currently serves as the SBA Seattle District Office’s Deputy District Director (DDD), a role which he took on in 2017.

As DDD, Costello acts as the District Director’s senior adviser and assists in overseeing the delivery of SBA programs and services throughout most of Washington state and northern Idaho.

Prior to his role as DDD, Costello served as the Supervisory Lender Relations Specialist for the Seattle District for many years. In this capacity he was responsible for working with nearly 100 lenders and Certified Development Companies to deliver SBA guaranteed financing to small businesses.

Costello graduated from Washington State University with a degree in finance. He and his wife, Gail, have two children who they have raised in Washington.