Tonya Lagrasta

In her role as Global Head of Sustainability at Colliers, Tonya Lagrasta leads the firm’s strategy, reporting, and integration across global operations. With over 20 years of experience in commercial real estate, property management, consulting, retail, and manufacturing. Tonya is known for driving measurable sustainability and social impact outcomes, generating long-term value for clients, communities and stakeholders. Previously, she served as Head of ESG and National Practice Leader, Sustainability Services at Colliers in Canada, where she built and scaled a national platform that helps clients reduce emissions, lower energy costs, and enhance asset resilience. She also led Colliers Canada’s corporate Sustainability, Inclusion, and Social Impact strategy as chair of the ESG Executive Steering Committee. Tonya brings deep cross-sectoral experience and has served in leadership roles on numerous boards and advisory councils, including her current role with the Canadian Environmental Ac