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Who we are

Mantle Developments provides consulting services to leading climate-smart construction projects. Many of our projects target net-zero carbon. We help the project team think beyond energy efficiency to also manage the carbon impact of the entire life cycle of the project from construction material manufacture to ultimate end-of-life and reuse. We also help our projects to be resilient to the changing climate.

Mantle Developments began in 2015 as a division of the interdisciplinary climate strategy consultancy Manifest Climate (previously named Mantle314). Mantle Developments was spun-out in 2021 to focus on climate-smart buildings and infrastructure.

Our team of climate experts are based in Toronto and Vancouver. We bridge the gap between climate innovation and real-world decision making for the built environment.


Ryan Zizzo

Founder & CEO // Toronto

Low-carbon infrastructure and construction

Ryan is a professional engineer with nearly 15 years of climate-smart construction project management experience across Canada and Europe. He creates and implements sustainability strategies that help clients understand, track and reduce their environmental impacts and exposure to climate change risk. Focus areas include net-zero strategies, green building certifications, embodied carbon life cycle assessment, and climate resiliency. His past experience includes managing and certifying LEED green building projects across Canada, lecturing graduate courses on life cycle assessment at Finland’s largest Technical University, and providing green building education seminars throughout Europe.

Zahra Teshnizi

Senior Advisor // Vancouver

Embodied carbon, green buildings and infrastructure

Zahra is an urban sustainability expert with more than eight years of experience in low embodied and operational-carbon buildings development. Zahra is well-connected to a network of climate change action leaders in the public, private, and academic sectors, especially in the Lower Mainland, British Columbia. She brings in a diverse background in policy advising, sustainable building innovation, multi-stakeholder outreach and engagement, and project management.


Senior Advisor // Toronto

Ph.D., LSc.Tech, MBA 
Energy Performance Consultant, Life Cycle Assessment,Climate and Energy Policy Assessment

Ali is a mechanical and sustainability engineer with over ten years of experience in energy performance analysis and life cycle assessment of projects, materials, and policies. His expertise includes supporting the energy efficiency and thermal comfort of buildings and goes further by analyzing the life cycle sustainability performance of buildings including greenhouse gas emissions. He examines buildings as a system and plans and implements different sustainable strategies to promote the holistic performance of the components through optimized design, materials selection, and construction practices.

Cristian Hurtado

Advisor // Toronto

Sustainable energy, green infrastructure, and climate resilience strategy

Cristian acts as Mantle Developments’ in-house energy expert, providing knowledge and leadership on projects related to advanced and innovative energy systems, low-carbon infrastructure, energy efficiency, and sustainable energy policy formulation and delivery. He supports clients by developing and implementing climate resilience strategies, conducting climate risk assessments for buildings and infrastructure, and facilitating green building certifications/reporting. He also provides research and advisory support on projects related to embodied carbon, life cycle assessments (LCAs), and benchmarking and standards.

Mandi Wesley

Advisor // Vancouver

Embodied carbon, mass timber and high-performance buildings

Mandi focuses on assessing embodied carbon emissions for green infrastructure projects, particularly mass timber and high-performance buildings. She has extensive knowledge of best practices for achieving green building certifications, such as LEED and Passive House. With her background in civil engineering and experience collaborating with multiple stakeholders, Mandi offers a well-versed perspective on data analysis, climate resilient construction and policy advising.

Ying Gu

Advisor // Toronto

Sustainable development, high-performance buildings, green building rating systems

Ying is an urban sustainability professional with 5 years of experience in the construction and real estate sector. Ying provides technical advice and expertise during the project design and consultant engagement processes, utilizing standard engineering and architectural practices along with sustainability principles to ensure consistency and alignment to capital plans, cost savings, and program needs. She has been involved with detailed analysis and documentation of various green building certifications.

We also work closely with team members Manifest Climate, who focus on corporate climate strategy and disclosure

Looking to reduce your climate-risk by creating developments that are aligned with a net zero and climate-adjusted future?

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