Sydney studied architecture at the University of Waterloo, where she received Bachelor of Environmental Studies and Bachelor of Architecture degrees. She also studied at University College in Dublin, where she studied under an international foundation scholarship for study abroad. She joined Diamond Schmitt Architects in 1999 and was made a Principal in 2010. She is a LEED accredited professional.
Her work with the firm includes a range of cultural and academic buildings including early schemes for the development of the Four Seasons Centre for the Performing Arts in Toronto, and the Max Fisher Performing Arts Centre for the Detroit Symphony. She also worked on the master plan and development of the Weston Family Innovation Centre at the Ontario Science Centre in Toronto, and was project architect for the Multimedia Learning Centre at the University of Windsor.
As Project Architect, Sydney completed the award winning 65,000 square foot Academic Library at the University of Ontario Institute of Technology and the new Library and Student Learning Commons at Centennial College in Toronto.