Died peacefully on April 16, 2026, in Ottawa surrounded by family after a courageous fight with cancer. Adored spouse to Michelle, devoted father to Nicholas, Christopher (Sofia) and Maximiliano and loving grandfather to Calian. Beloved brother to Teresita (Eddy) and Juan Martin (Margarita); brother-in-law to Stacy (Nigel); and son-in-law to Lorne and Brenda. And adoring uncle to Teresita, Ximena, Tomas, Josefina, Martina, Augustin and Hannah. Guillermo was predeceased by his loving parents Guillermo Ceppi Perdriel and Teresita Muinos Ceppi of Adrogué, Argentina.
Guillermo was the Chief Architect at Global Affairs Canada for almost two decades and an expert in diplomatic facility design. In this work he amalgamated his passion for the built environment with his love of travel and culture. Guillermo graduated from the University of Buenos Aires with a Master of Architecture degree and license and practiced architecture in Argentina before relocating to Canada for post graduate studies in architecture at McGill. Licensed in Ontario and Quebec (retired) and a fellow in the Royal Architectural Institute of Canada, he left his mark in private practice and public service. Guillermo’s early education was at St. Michael’s College in Adrogué, Argentina and he maintained many cherished lifelong friendships with “the Greens”!
Always generous with a smile and his time, he will be remembered for his wit, humour and zest for living. He lived a full life, loved and was well loved by his family and many cherished friends including Solange (Oscar) and Dario.
The family thanks Dr Derek Jonkers, Dr Charlene Habibi and Kas for their dedicated care, kindness and support during his cancer journey. In lieu of flowers donations to the Canadian Cancer Society are welcome.
A private funeral service has been held at Beechwood Funeral, Cemetery and Cremation Services.
Digital Guestbook
Nart Stas
Lilanthi Arokiadas
Dear Michelle and Max,
Please accept my deepest condolences for your loss. My family and I were shocked to hear of Guillermo's passing.
He was the most wonderful Director I have had in my 17-year career. I cannot find the words to express the pain of such a loss and he will be greatly missed.
Our thoughts and prayers are with you and your family during this difficult time.
May the Lord grant eternal rest to his beautiful soul.!!
With deepest sympathy!!!
Laurie McEachern Global Affairs Canada
My sincere condolences. May your happy memories give you peace and comfort during this challenging time.
Sarvdeep Sangwan
Please accept my sincere condolences. Guillermo was truly an inspiration to many of us, including me.
Dear Michelle and family,
I was deeply saddened to learn of the passing of our colleague Guillermo. I had the privilege of working closely with him on several projects, most recently the new chanceries in Canberra and Colombo. He was an exceptional architect whose contributions were invaluable, and his humility, pragmatic approach, and sense of humour made him a pleasure to work with.
I also wish to acknowledge the remarkable courage he demonstrated in facing his illness. Even during this difficult period, he remained engaged and continued to support the projects we worked on together with dedication and professionalism. His commitment and strength left a lasting impression on all of us.
Please accept my sincere condolences during this difficult time.