Mary (she/her) was born and raised in Seattle. She graduated magna cum laude from Santa Clara University with a degree in English. She earned her law degree from the University of Washington in 2012. During law school, Mary served as Executive Managing Editor for the Washington Law Review, and was awarded the Carkeek Prize for best student article published in the journal. Mary clerked for the Honorable Marlin J. Appelwick on the Washington Court of Appeals, Division I, following law school.

Mary joined Nielsen Koch & Grannis as a staff attorney in 2014 and became a partner in 2026. Mary handles criminal, dependency, and civil commitment appeals, and has argued over 250 cases before the Washington Court of Appeals and Washington Supreme Court. She was selected as a ‘Rising Star’ by Washington Law & Politics magazine for six years running, 2017-2022. Mary was also recognized by the Washington Defender Association in 2020 for her extraordinary efforts in State v. Mayfield, 192 Wn.2d 871 (2019) (rejecting federal attenuation doctrine and holding consent to search given during an illegal seizure was invalid under extremely narrow state attenuation doctrine).