Serving West Michigan Since 1899

Margaret O'Sullivan

March 5, 1978 - March 12, 2020
Holland, MI


Life Story / Obituary


Margaret Jean O’Sullivan (nee Kollar) died March 12, 2020 at her home in Holland, Michigan.

Margaret was born March 5, 1978 in Chicago, Illinois. She is the oldest (by 7 minutes) of four children. She is survived by her true love, husband Tony O’Sullivan. She has three beautiful children; Tommy age 5, Padraig age 3, and Brigid age 3. She was passionate about her kids and her husband.

Margaret knew from a child that she would be a teacher. Her siblings can attest to that as she practiced on them repeatedly. Margaret taught science for over a decade in the Chicago Public Schools and was a mentor to other science teachers. She has two Masters degrees. Recently, she started her own business, NGS Navigators, to help teachers with science-based lesson plans. Margaret never stopped loving to learn. She loved taking her kids to museums in Chicago and Holland.

Margaret was very warm and caring, her mere presence put people at ease. She let everyone know they mattered and she appreciated them. Margaret believed in science and shared facts. But she was never boring. She had the best sense of humor and a contagious laugh. Her smile would light up a room. She loved a good dance party and night in with friends.

Margaret is survived by her parents, Mark and Cathy Kollar, twin sister Caroline Murray (Jim), brother Matthew (Laura), and sister Stephanie Coughlin (Kevin). Sisters-in-law of Sonia O’Sullivan (Nic) and Gillian Henschke. Loving aunt of eight nieces (Ciara, Sophie, Alison, Darlene, Josephine, Rose, Irene & Lucia), and two nephews (Connor & Kevin). Mother-in-law and Father-in law, Mary and John O’Sullivan.

Margaret had triple negative metastatic breast cancer. She lived courageously until she died with honor and dignity in the presence of her beloved husband and family in her beautiful home.

A graveside ceremony will take place at 1:00 pm, Tuesday, March 17, at Ridgeview Memorial Gardens, 5151 8th Avenue SW, Grandville, MI. Father Charlie Brown presiding.

In lieu of flowers, please consider donating to a cause championed by Margaret, Metavivor, an organization dedicated to research and support for men and women living with metastatic breast cancer.

Professional services entrusted to the Northwood Chapel.