Died peacefully, on April 16, 2026, in Ottawa, surrounded by family, after a courageous fight with cancer. Adored spouse of Michelle; devoted father to Nicholas, Christopher (Sofia), and Maximiliano; and loving grandfather to Calian. Beloved brother to Teresita (Eddie) and Juan Martin (Margarita), brother-in-law to Stacy (Nigel) and son-in-law to Lorne and Brenda. Adoring uncle to Teresita, Ximena, Tomas, Josefina, Martina, Agustin and Hannah. Guillermo was predeceased by his loving parents, Guillermo and Teresita Ceppi of Adrogue, 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 professional license, and practiced architecture in Argentina before relocating to Canada for postgraduate studies in architecture at McGill. Licensed in Ontario and Quebec (retired), and a Fellow of the Royal Architectural Institute of Canada, he left his mark in private practice and public service.
Always generous with his time and his smile, 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), Dario and “the Greens”.
The family wishes to thank 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.
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