Gregor O'Shaughnessy was a Manticoran citizen and intelligence specialist.
Around 1920 PD, he served as the senior civilian intelligence analyst for Dame Estelle Matsuko, Baroness of Medusa and Imperial Governor General for the Talbott Quadrant. (SI2)
In 1921 PD when Admiral Sandra Crandall and Task Force 496 arrived in the Spindle System, he was the first Manticoran representative to receive their communications. Rather than panic at the arrival of the Solarian League Navy and their delay in communicating, he read a detective novel by Darcy Lord starring Garrett Randall. (HH12)