Lock is the daughter of J. Ronald Frazer, a hockey player and business school professor at Clarkson University.
[4] After working for a term as an instructor at the United States Naval Academy, she joined St. Lawrence University in 1981.
[3] She has served the Mathematical Association of America as chair of its Special Interest Group on Statistics Education for 2015–2016.
[5] With Deborah Hughes Hallett, Andrew M. Gleason, and others, Lock is one of the co-authors of the Harvard Calculus Consortium series of textbooks.
[7][8] In 2016 the Seaway Section of the Mathematical Association of America gave Lock their Clarence Stephens Distinguished Teaching Award.