Age: Born 1944
Appearance: Dark hair, blue eyes, 5'8" tall, average build, young for her age
Occupation:: Executive Vice-President, Marshall Industries
Parents: Bill and Margaret Tierney (both deceased)
Siblings: Two brothers and two sisters (all absent)
Children: Nick Marshall, Maggie King, and Andrew Marshall
Close Friendships: Helen Flynn and Arlie Marshall
Loves: Married to John Marshall
Personal History: Maureen grew up in Victoria with four older siblings (all of whom have moved away), and was John's high school sweetheart. She, too, went to school in Victoria, but remained a stay-at-home mother until Andrew started elementary school. With so much time on her hands, she returned to school herself and earned a second degree, Bachelor of Commerce, before going on to earn an MBA. Next to Pierce and John, she holds the most power at Marshall Industries.