Toronto Metropolitan University (formerly Ryerson University), Bachelor of Applied Arts in Interior Design, 1990
University of Toronto, Bachelor of Arts, 1986

Professional Affiliations

Member: Association of Registered Interior Designers of Ontario
Member: Interior Designers of Canada
Member: LEED Accredited Professional

Major Projects

Carleton University ARISE Building
Cayman Islands Long Term Residential Mental Health Facility
Centre for Addiction and Mental Health Phase 1C
Corner Brook Long Term Care
George Street Revitalization
Hogarth Riverview Manor and Sister Leila Greco Apartments
Montcrest School Redevelopment
Ontario Tech University Shawenjigewining Hall
Peel Manor Senior’s Health and Wellness Village
Sheridan College HMC Phase 2
University of Toronto Myhal Centre for Engineering Innovation and Entrepreneurship
West Park Healthcare Centre
Yee Hong Centre for Geriatric Care – Finch II (Ng Siu Chan) Centre

Brampton Courthouse Addition Phase 2, PDC

Gabrielle Rossit


Senior Associate, Interior Designer

Gabrielle is an award-winning interior designer with over 30 years’ industry experience. She joined Montgomery Sisam in 2016 with an extensive portfolio of large and often complex institutional and civic infrastructure projects. As an interior designer, she is proficient in many scopes of work, including design, project management, planning, programming, as well as furniture selection and procurement. She is highly experienced in Alternative Financing Procurement (AFP) model projects, having played an integral role on many Planning Design and Conformance(PDC) and Project Delivery teams.

At Montgomery Sisam, Gabrielle works alongside our health, long-term care, higher education and courthouse teams to create holistic design solutions by evaluating program and operational needs, in order to create built environments that support design, functionality and  wellness for the occupants. Gabrielle’s practice is rooted in understanding users and their needs. She works closely with people of all ages, abilities, and backgrounds to develop targeted solutions that improve the fit and functionality of their space and create safe, inclusive, accessible experiences. Intrinsic to this practice is an emphasis on efficiency and flexibility achieved through innovative space planning, integrated technology, and intelligent furniture applications developed within and in response to base building constraints.

Gabrielle is a LEED ID&C accredited professional and long-time advocate of the WELL Standard. In every project, she works to ensure design decisions not only consider the aesthetics, durability, functionality, cleanability, cost but also sustainability and human health. Her knowledge of and fluency in materials are extensive. She is continually researching new and innovative products and technologies and creating opportunities for staff to engage with and learn from different specialists.  She has regularly participated in design committees and supports the evaluation of prototypes and new products for the market within the A&D community.