Decarbonizing the Built Environment: How to Accelerate the Transition to Net Zero

The buildings sector accounts for nearly 40% of energy and process-related CO 2 emissions. Legence and its panel of experts will share a unique process to overcome the fragmented and siloed approach that is the greatest barrier to transition to a low carbon building sector. Through actionable plans that reach organizational sustainability goals, industry leaders will draw from their expertise across all project stages – from ESG advisory to engineering and design to project execution – to share real-world examples of how Legence has successfully simplified the complexity of decarbonization and makes the business case to reduce emissions, lower costs and enhance building performance through a stackable solutions model. Our panel will also cover available and time sensitive financing incentives, including provisions within the recent Inflation Reduction Act (IRA).

Presented By


About The Speakers

Marcius Extavour - Chief Solutions Officer, TIME CO2

Marcius Extavour - Chief Solutions Officer, TIME CO2

Eryn Devola is the Vice President of Sustainability for Siemens Digital Industries, where she leads the Sustainability horizontal market to manage the strategy for profitable sustainability for Siemens and our customers. Eryn has been part of the Siemens team since 2012, most recently as the North America Director of Sales for Siemens Large Drive Applications. Her career includes roles of increasing responsibility across quality, plant management, operations, and sales.

She has long had a passion for sustainable product development and production. Eryn completed an NFS Fellowship focused on Environmentally Conscious Manufacturing and has applied the knowledge she gained there to many roles in her career. Eryn has a bachelor’s and master’s in mechanical engineering from Michigan Technology University, and an MBA from the University of Louisville..

Arif Quraishi - Legence

Arif Quraishi - Chief Growth Officer at Legence

Mr. Quraishi is currently Chief Growth Officer for Legence and is focused on leveraging ESG advisory, design and implementation services to assist a wide range of customers reduce their building carbon footprint and improve Indoor Air Quality. Arif has over 30 years of experience in overseeing building design, construction and renovation that focus on energy efficiency, clean energy and indoor environmental quality. He and his team have implemented over $5 Billion worth of projects over the last 5 years in the built environment. His past experience with the Institute for Environmental Assessment (CEO), Johnson Controls (North America VP of Energy Solutions) and Philips Lighting (North America VP) have given him a unique perspective on how to scale and expedite programs to significantly improve
Building Efficiency. Mr. Quraishi has a B.S. in Mechanical Engineering from Lehigh University in Bethlehem, PA and an MBA from the University of St. Thomas in Minneapolis MN.

Erin Richmond - RE Tech Advisors

Erin Richmond - Executive Vice President of RE Tech Advisors, a Legence Company

Erin Richmond has over 20 years of experience designing and managing client energy efficiency programs in commercial buildings with a focus on healthcare, senior care, and hospitality buildings for both government programs and real estate owners.  As Executive Vice President of RE Tech Advisors, LLC, Erin oversees day-to-day operations, leading an interdisciplinary team of energy and sustainability program experts who help clients design and implement award-winning sustainability programs.  Erin began her career supporting EPA’s ENERGY STAR program developing an expertise in public-private partnership programs as well as energy efficiency strategies.  As businesses increasingly needed support with their own programs, Erin began developing and managing sustainability programs for real estate owners, such as Wyndham Hotels and Resorts and Blackstone, creating innovative solutions to successfully embed energy saving strategies at the property level, while saving clients millions of dollars in energy and water costs and reducing greenhouse gas emissions.  During her career, Erin also led, in support of ENERGY STAR, survey and data collection efforts that resulted in the first ENERGY STAR scores for senior care and multifamily buildings, ensuring these building types could benefit from the ability to benchmark energy performance.   Erin also serves on the board of directors for SustainableScoop, a nonprofit working to develop strong, future civic leaders by providing training, programming and production experiences in the media arts, with a lens on sustainability.

Nathalie Kiersznowski  - Black Bear Energy

Nathalie Kiersznowski - Senior Associate, Black Bear Energy, a Legence Company

Nathalie Kiersznowski works as a Senior Associate for Black Bear Energy, the country’s leading owner’s representative for onsite renewables. Nathalie is part of the client operations team at Black Bear and personally leads the solar initiatives for 15 of the largest commercial property owners in the U.S. In 2022, Nathalie and her team issued RFPs for over 1 GW of onsite solar, and 10% of the forecasted U.S. C&I solar capacity comes out of this work. With an impressive track record, Nathalie has successfully awarded and contracted over 50 MW of rooftop solar projects. Nathalie also leads Black Bear’s team in educating clients on how to best take advantage of new incentives and credits available in the Inflation Reduction Act. Before joining Black Bear, Nathalie worked in energy security and climate research roles at The Harvard Belfer Center and the World Bank, researching US-China renewable energy supply chains.


Marcius Extavour

Arif Quraishi

Erin Richmond

Nathalie Kiersznowski


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