Exceptional design leaders, at your service
We can only do what we do because of the team we have assembled. They represent decades of project experience and can only be described as the best in the business.
Our Leadership team

Greg Quinn
Principal | CEO
Greg has the unique ability to transform clients’ needs and requirements into dynamic environments with a complete respect for the project constraints of budget and schedule. He has helped some of Canada’s leading companies through major times of change and construction.

Sheri Crawford
Principal
Sheri’s career spans over 20 years in Interior Design working in a variety of projects in Hamilton, and surrounding areas. Her specialty lies within the commercial and renovation sectors, designing spaces that respond to human need, regulations, accessibility and social solutions that are void of user discrimination.

Mario Colarossi
Principal Emeritus
Prior to Colarossi + Associates merging with X-Design, Mario led the highly respected workplace design firm in Ontario for 29 years. His commitment to client service has meant that some of the firm’s clients have been coming back to him not just for a couple of projects, but for a couple of decades.

Pauline Petri
Chief Sales Officer
With over 15 years of experience in the design and construction industry, Pauline has helped a diverse group of companies with operations, finance and accounting. At X-Design, she is leading business development and sales initiatives to align with the goals and objectives of our clients.

Dianne Erwin-Nurse
Associate / Sr. Designer
Dianne has spent over 30 years providing leading-edge design solutions to a diverse clientele. Her strengths include excellent client relations to ensure long lasting relationships, and a deep understanding of the design management process required to complete complex projects on time and on budget.