Background
Costello, Gregory Thomas was born on March 3, 1958 in Danville, Pennsylvania, United States. Son of Thomas Joseph and Katherine Mary Jane (Cowan) Costello.
Costello, Gregory Thomas was born on March 3, 1958 in Danville, Pennsylvania, United States. Son of Thomas Joseph and Katherine Mary Jane (Cowan) Costello.
University of Virginia (Bachelor of Arts, with distinction, 1980). University of Colorado (Juris Doctor, 1985. Law Clerk to Chief Judge Sherman Finesilver, United States.
District Court, District of Colorado, 1985-1986.
Law clerk, United States District Court Colorado, 1985-1986; associate, Perkins, Coie, Seattle, 1986-1990; associate, Riddell, Williams, Bullitt & Walkinshaw, Seattle, 1990-1992; partner, Riddell, Williams, Bullitt & Walkinshaw, Seattle, since 1992.
Member Sierra Club (chairman legal committee Cascade chapter 1990-1992), WashingtonWilderness Coalition (board directors 1990-1991).
Married Maria CynthiaWagoner, September 10, 1988.