MARY M. O'LEARY
October 22, 2018
Mary M. O’Leary currently lends her expertise as a patient advocate in St. Helena, California, and a consultant with the Ascellon Corporation.
Mary M. O’Leary currently lends her expertise as a patient advocate in St. Helena, California, and a consultant with the Ascellon Corporation.
Marquis Who’s Who was established in 1898 and promptly began publishing biographical data in 1899. More than 120 years ago, our founder, Albert Nelson Marquis, established a standard of excellence with the first publication of Who’s Who in America.