Marg led an active social life while attending St. Lambert High and then Chambly County High, well documented in the photo sections of successive Annuals. While the CCHS 1952 Annual entry noted that “due to her organizing ability, we always depended on Margaret to start things moving”, it was after high school that her life started to take shape and her entrepreneurial skills and community leadership really developed. Marg's annual quotation: “High school days have many delights, but they cannot compare with college knights” was also prescient: David Coll and she were married in between his Bachelor's and Master's degrees: he attended university while she worked at the telephone company on Beaver Hall Hill. Then, while he was on leave from the Defence Research Board, they went on to MIT in Boston. Marg worked as the Main Lobby Receptionist for New England Tel& Tel, acting as the corporate greeter and supervising the elevator staff, and later as a Customer Service Rep in South Boston and Malden. Her ability to organize and lead came to the fore as she became the President of the MIT Dames – the student wives association with 450 members. Once back in Ottawa she and Dave settled in to have a family of three and Dave began his final career as Professor of Engineering at Carleton University. Marg was President of the Faculty Wives of Carleton University twice.

However, she knew she had to do more with her life so, in her mid-thirties, she started attending night classes at Algonquin College to prepare to begin her own business. At the age of forty, she started a conference planning company. Her company, Conference Coll Inc., lasted for a very successful 26 years in Ottawa mostly handling conferences for the thriving high tech industry. She traveled to work in places like Alaska, Las Vegas, Washington, Boston, Vancouver, Toronto (many times), Montreal and Quebec City. Her conference work brought her into contact with community high tech industry leaders, and Dave soon became known among the movers and shakers as Marg Coll's husband.

When Marg decided it was time to retire she faced the dilemma of what to do. Now, four years later, she is the Past President of the Chimo Cottager's Corporation; the President of Ottawa Lifelong Learning for Older Adults; Vice President of the Senior's Advisory Committee for the City of Ottawa; and is on the Board of Directors of her favourite charity Serenity Renewal for Families (SRF) where she is also the Chair of the Annual Dinner and Auction for the SRF. Marg is on the Outreach Committee of her church, and manages a group of called “Our Conversation Group”.

Marg's passion has always been our dogs, the last four of the Golden Retriever breed; and now she and Dave are blessed with four wonderful grandchildren. Dave talked about their children in his biography. Marg and Dave have two cottages, one on their very own island and one onshore nearby, in the Calabogie area on Black Donald Lake. They like to travel, having been to Italy and recently to Greece, both with the McGill Alumni Association and have an upcoming trip to Russia with the same group. They also went on a cruise to Alaska. Marg considers that her life is blessed.