One of Kentucky’s largest firms, Stoll Keenon Ogden, has opened an office in Western Pennsylvania with three of its existing lawyers who focus their practices on real estate due diligence and title examinations for oil and gas, as well as coal, producers.

The office, located in the Southpointe business park in Washington County, Pa., is the Lexington-based firm’s first location outside of Kentucky and will be led by member David H. Thomason, who has more than 45 years’ experience in mineral law.