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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. He currently teaches a graduate course in low-carbon construction materials and life cycle assessment at Toronto Metropolitan University's Faculty of Engineering & Architectural Science. He currently teaches a graduate course in low-carbon construction materials and life cycle assessment at Toronto Metropolitan University's Faculty of Engineering & Architectural Science.

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.

Kathleen Kauth

Chief Operating Officer // Toronto

Olympian & Clean Tech Executive
Clean technology and low carbon operations & business development

Kathleen is a business development and operations professional with nearly 15 years of experience in driving clean technology products and projects to market. She supports the Mantle team by enabling it to maximize its impact in the climate transition through operations, strategy, business development, and team management. 

Alanna Komisar

Senior Advisor // Toronto

MEng, BASc
Climate adaptation and resiliency, energy, sustainability strategy development, and facilitation

Alanna is a climate mitigation and adaptation professional with over a decade of experience supporting the building sector’s low-carbon transition. She uses her previous experience in energy efficiency, policy development, carbon utilization, cleantech, and risk mitigation engineering to create novel solutions. She has an undergraduate degree in civil engineering and a masters in mechanical engineering from the University of Toronto.

Kartiki Deshpande

Senior Advisor // Vancouver

M Arch, B Arch, LEEP AP, WELL AP
LEED, sustainability, project management, and client engagement

Kartiki is a green building professional with a Bachelor’s in Architecture and a Master’s in Architecture from Virginia Tech, USA. She is a LEED and WELL accredited professional. 

Kartiki has over ten years of experience working for the green building certification systems in Canada and US, conducting reviews and supporting hundreds of projects. Her key skills include sustainability, project management, stakeholder relationships, liaising between departments to collaborate projects and technical writing.

She supports clients by coordinating, developing, and sharing best practices and strategies related to low carbon building design and operation.

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.

Javaria Ahmad

Advisor // Toronto

MES, LEED Green Associate
Embodied carbon, building design, and sustainability policy

Javaria Ahmad has a Bachelor’s in Architecture Design from Pakistan, a postgraduate in green architecture from Algonquin College, and a Masters in Environment and Sustainability (MES) from Western University. She has seven years of experience in research, analysis, consulting, and building design.

Javaria previously worked as an analyst consulting on federal and city-level climate action policy for material embodied carbon in residential construction with projects in Ontario and BC. She has led sustainability initiatives, developing and implementing corporate sustainability policies. She studied urban and building-scaled carbon emissions throughout her post-graduate education. Javaria is an accredited LEED Green Associate with proven knowledge of policy consulting, building design, and embodied carbon analysis. 

Michael Chen

Advisor // Toronto

Climate reporting and disclosure, sustainable finance, and environmental policy

Michael assists financial institutions in their decarbonization journey. He supports clients through developing science-based emissions targets using SBTi target-setting tools and other net-zero frameworks and navigating the voluntary carbon offset market. With a background in international relations, smart cities, and sustainable finance, he provides a strong understanding of global trends in sustainability for companies looking to align and take advantage of emerging climate-related themes in finance.

Eslam Elshorbagy

Advisor // Ottawa, ON

MASc, PMP, LEED Green Associate
Net zero-life cycle construction management.

Eslam Elshorbagy works at the interface of engineering and policy to achieve net-zero buildings and infrastructure. He is the founder of the Carbon Leadership Forum Ottawa Hub. he worked as a research and teaching assistant at the department of Civil Engineering at the University of Ottawa. His research focused on applying a life cycle thinking approach to provide evidence for decision-makers. His projects included urban comparative analysis, campus as a living lab initiative, and building’s integrated renewable energy and energy storage analysis. Eslam holds a Master of Applied Science in Civil Engineering and Policy from the University of Ottawa and a Postgraduate Diploma in Project Management.

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?