Elizabeth “Libby” Haynes Mooney, 70, of Westport Island, passed away in her home on July 21, 2025.  

Libby was born in Boston on Sept. 21, 1954, the daughter of Charles A. Haynes Jr. and Avril M. (Stuart) Haynes.  

Libby was a graduate of Girls Latin School in Boston and Tufts University in structural engineering. She worked in the Electric Boat Division for General Dynamics in Groton, Connecticut and then for Neil and Gunter Consulting Engineers in Scarborough, Maine. She was a teacher of mathematics at Freeport (Maine) High School and then physics and mathematics at Lincoln Academy, Newcastle where she was also the math team coach.  

Her passions were her family, music and her faith at the First Congregational Church in Wiscasset where she sang in the choir, and teaching and mentoring students where she taught. She enjoyed sports, hiking and adventuring, was an avid reader and solving word and number problems. She also enjoyed sailing on the schooner Heritage and was a firefighter for the Westport Island Volunteer Fire Department. She also was deeply attached to her pets, both dogs and cats, throughout her life.  

Libby is survived by her husband, Robert “Bob” Mooney, and her sister Martha and her family.  

A Celebration of Life service will held on Saturday, Sept. 20 at 10 a.m. at the First Congregational Church on Wiscasset, 28 High St., Wiscasset.

In lieu of flowers, donations can be made in Libby’s honor to the First Congregational Church in Wiscasset, Organ Fund, at P.O. Box 350, Wiscasset, ME 04578.