In the 1950's, the law firm of Pairo & Pairo was founded in Baltimore by Preston Pairo and his oldest son, Preston Pairo, Jr., a former Assistant State's Attorney for Baltimore City. Richard Pairo, the younger son of Preston Pairo, joined the firm in the 1960's.

Upon the passing of Preston Pairo in 1973, the brothers continued the practice in Baltimore City until they each established separate offices in their respective home counties.

In 1984, Preston Pairo III joined his father in the practice of law, and shortly thereafter the father-and-son law firm of Pairo & Pairo was re-established for another generation.

After nearly 60 years in the practice of law, Preston Pairo, Jr. passed away on October 10, 2010. His obituary appeared in the Baltimore Sun.

Today, Preston Pairo III continues the law firm with the dedication and spirit passed along to him by his father and grandfather.

In addition to his work as an attorney, he has published nine novels and served as a pre-production legal advisor for the CBS movie of the week, "Power of Attorney."