Jeremy Rifkin

Jeremy Rifkin

Featuring Special Guest Jeremy Rifkin!​

We are pleased to announce that economist, climate visionary, and bestselling author Jeremy Rifkin will be kicking off the Developer’s Summit with opening remarks on April 26.

Rifkin is the bestselling author of 22 books including The Third Industrial Revolution, The Zero Marginal Cost Society, and The Green New Deal. His books have been translated into more than 35 languages. Rifkin is a principal architect of the European Union’s and the People’s Republic of China’s economic plans to transition into a Third Industrial Revolution zero-emission economy and society to address climate change. Rifkin is also an advisor to US Senate Majority Leader Charles Schumer on the government’s Build Back Better infrastructure plan.




Charlene Andres

Director of Affordable Housing, LUCHA

As an architect with over 20 years of experience and a developer with over 10 years of experience, Ms. Andreas has a broad base of knowledge in planning, developing, and constructing affordable housing in addition to an understanding of community development and finance. Most recently, she was responsible for completing Tierra Linda Apartments, a $17.4 million development that provides sustainable and healthy affordable housing, including the first Phius multifamily building in Chicago. Ms. Andreas is a Registered Architect-WI and Certified Occupancy Specialist.


Tom Collins

Assistant Professor of Architecture, Ball State University
Tom Collins is Assistant Professor of Architecture at Ball State University where he teaches upper-level design and environmental systems courses. He holds B.ARCH and B.S. in Building Science degrees from Rensselaer Polytechnic Institute and M.ARCH and a PhD in Sustainable Architecture degrees from the University of Oregon. A Registered Architect, Tom has worked in professional practice and has taught architecture at The Boston Architectural College, University of Oregon, and Ball State University. His focus areas are high-performance buildings and occupant experience.

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He has advised over 16 Ball State Solar Decathlon Design Challenge teams since 2017 and is currently a primary advisor for Ball State’s 2023 Solar Decathlon Build Challenge entry, which is an affordable, net-positive energy, duplex in Indianapolis that will be Phius Core Prescriptive and Sustainable SITES certified.


Isaac Elnecave, Moderator

Phius Policy Specialist

Isaac Elnecave joined the Phius Certification Team in 2019. He provides design review and energy modeling services to evaluate project qualifications for Phius+ Certification. Isaac works closely with the submitting CPHC® to provide feedback on questions pertaining to energy modeling and building plans.

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Prior to joining Phius, Isaac worked as a policy manager focused on promoting the development, adoption and implementation of the latest building energy codes and appliance efficiency standards. Isaac also worked as a civil engineer in Southern California where he designed seismic retrofits for older buildings susceptible to damage from earthquakes.

Isaac has a Bachelor’s Degree in Engineering Mechanics from the Columbia University School of Engineering and Applied Science as well as a Masters in Public Policy from the University of California at Los Angeles.


Alan Gibson

Phius Board Secretary | Partner, G O Logic LLC

Alan Gibson is a builder and partner in G O Logic LLC of Belfast, Maine, where he is chiefly responsible for construction operations. Since 2009 he has managed construction of three certified passive buildings and a 36-unit co-housing community built to near-passive standards, among other projects. The GO Home, completed in 2010, was the first certified passive house in Maine and recipient of the US Green Building Council’s Residential Project of the Year award in 2011.

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Terrahaus, the country’s first passive house-certified dormitory, received the Evergreen Award from Eco-Structure magazine in 2012. Alan holds a BA from Brown University and is a Certified Passive House Builder and Certified Passive House Designer. He has been a business owner since 1992 and speaks widely on passive design and construction.


Katrin Klingenberg, Moderator

Phius Co-Founder and Executive Director

Katrin Klingenberg is a visionary who has driven adoption of the Phius Standard throughout the past 20 years. Passive building methodology originated in the United States and Canada in the 1970s and was enhanced in Germany in the 1990s. Klingenberg reinvigorated it in the United States in 2003 when she built the first passive house in Champaign-Urbana. Her home sparked considerable interest and she went on to found the non-profit organization Phius (Passive House Institute US), dedicated to making passive building a mainstream best practice.

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She developed and delivered building-science based training on how to design and build energy efficient and zero-energy buildings. Over the past ten years she has collaborated with federal and state government agencies to tailor the Phius Standard for each of the nine US climate zones— an adaptation that cost-optimized passive building and has driven widespread adoption. She has also consulted internationally to adapt the standard for climate zones around the world. Phius continually refines the standard to meet increasingly stringent efficiency goals, to make buildings meet carbon neutrality goals, and to make buildings the core building block of the 21st century electrical grid: resilient, digitized, distributed and interactive.

Ms. Klingenberg has designed and consulted on numerous passive building projects globally. In her role as Executive Director of Phius, she directs the technical, research and educational programs of the organization. Klingenberg earned a B.S. in Architecture from the Technische Universität in Berlin, Germany, earned an M.S. in Architecture from Ball State University, and is a licensed architect in Germany.

Ms. Klingenberg has written numerous magazine articles and made several book contributions. She has presented nationally and internationally on the topic of passive building science. Most recent publications: Chapter 14 Stranded Carbon: Approach every project as though PHIUS+, the building energy code of the future, were in effect today in: “Sustainable Nation – Urban Design Patterns for the Future,” Douglas Farr, Wiley 2018; chapter Passive Building and Bioclimatic Architecture in “Handbook of Energy Efficiency in Buildings,” Elsevier 2018; chapter Passive House in “Encyclopedia of Sustainability Science and Technology,” Springer 2012, updated in 2018; Zero Energy & Carbon Buildings Based on Climate Specific Passive Building Standards for North America, Journal of Building Physics, SAGE Publications 2016; and the U.S. Department of Energy, Building Technologies Office, Building America Program Report Climate-Specific Passive Building Standards, NREL 2015.

In 2015 she won the Woman in Sustainability Leadership Award (WSLA2015). In 2017 she was one of 12 women entrepreneurs selected from around the world for the Global Ambassador Program of Vital Voices.


Abigail Lane

Director of Community and Development,

Englewood Community Development Corporation

Abigail Lane is the Director of Community and Development for Englewood Community Development Corporation on the Near Eastside of Indianapolis and has been part of the organization for five years. Abigail graduated with her Bachelors of Urban Planning and Development from Ball State University in 2016 and her Masters of Urban and Regional Planning from Ball State University in 2017.

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Since being at Englewood CDC, Abigail has helped facilitate over $75 million of development in adaptive reuse projects, historic renovations and new construction consisting of education facilities, economic development/job creation and affordable housing projects working with a myriad of partners and funding sources. As a part of Englewood CDC, Abigail leads many of the development projects and programmatic work Englewood pursues to benefit low-income neighbors, marginalized populations, and those without access to resources to incorporate them into the community and provide access to basic needs for families. Englewood CDC is part of a number of comprehensive community development initiatives including the IndyEast Promise Zone, Great Places 2020 Initiative, East Washington Street Partnership, East10 Art + Design District, Near Eastside Quality of Life Plan, Thrive Indianapolis Plan, and more that guide their work on a daily basis.


James Ortega

Phius Certification Manager

After graduating magna cum laude from the Illinois Institute of Technology in Chicago, Illinois with a Bachelor of Architecture degree in May of 2015, Ortega began his professional career at Phius as assistant to the project certification manager and became a Certified Passive House Consultant (CPHC®).

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In 2018, Ortega became a licensed architect in the state of Illinois after passing the state’s architecture registration exams. The next year, Ortega became the Project Certification Manager where he provides design review and energy modeling services to evaluate project qualifications for Phius+ Certification. Ortega works closely with submitting CPHCs to provide feedback on questions pertaining to energy modeling and building plans. He also provides consulting services on static and dynamic energy modeling in WUFI Passive and THERM, and spearheads energy modeling deliverables on feasibility studies for projects interested in pursuing Phius+ Certification.

In addition to his main role at Phius, Ortega is a member of Phius’ Technical Committee which is comprised of building science and passive building experts from architecture, construction, government, and academia. The Committee’s expert technical input is critical to many of Phius’ programs, including project certification, verified window performance data program, verified building/panel system program, CPHC training curriculum, PhiusCon, climate-specific passive building standards and technical publications.


Mark Pignatelli

Senior Manager, ICF

Mark Pignatelli has over 15 years of experience in the energy efficiency industry. He is currently a Senior Manager with ICF and a member of ICF’s National Team operating as the National New Homes Offering Owner. In this role, Mark provides leadership and support to local energy efficiency teams across the United States. Mark is also responsible for a portfolio of energy efficiency programs in New England including management of the Mass Save Residential New Construction Program, Mass Save Heating & Cooling, and Energize Connecticut Passive House Initiative.

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Combined, these offers promote the benefits of residential high performance new construction, energy efficient equipment, and workforce development with a goal to maximize energy efficiency. He works closely with Utility clients, HERS Raters, builders, developers, and architects to transform the market towards above-code new construction, drive deeper energy savings, maximize energy efficiency incentives and expand the Passive House professional workforce in MA and CT. He is currently a member of the Association of Energy Services Professionals, Home Builders & Remodelers Association of Western Massachusetts, Northeast Sustainable Energy Association and holds an Enterprise Program Management and HERS Associate certification.


Sloan Ritchie

Founder and President, Cascade Built

Sloan Ritchie is a pioneer in the Passive House movement in Seattle. As a developer and general contractor, Sloan draws on building science principles and decades of experience to guide the design and construction of buildings that use up to 80% less energy for heating and cooling. With buildings accounting for nearly 40% of CO2 emissions in the US, Sloan sees the opportunity to address climate change through designing and delivering high-quality, comfortable and efficient buildings.

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His mission is to demonstrate the scalability and feasibility of using Passive House construction techniques to build cost-competitive high-performance projects, establishing Seattle as a leader in the nation and changing the way people think about where they live and work. Sloan is a graduate of Whitman College and an MBA graduate of the University of Washington. He speaks on the topic of residential green building and Passive House. He is a sought-after expert for interviews on his approach, drive and project experience. His team and clients appreciate his approachable, calm nature and hands-on, insightful leadership style.

Off work, Sloan enjoys windsurfing and traveling with his wife, Jennifer, and their two children.


Megan Spitz

Assistant Director of Policy and Research,
Illinois Housing Development Authority 

Spitz leads a team of researchers and policy makers to look at best practices, conduct thorough data analysis, and prepare materials that improve existing IHDA programs and help design future programs. The team produces internal policy briefs, follows developments throughout the pipeline process, and provides analysis of policies as they perform in programs.


Christoph Stump

Vice President, Design & Construction, Trinity Financial

Christoph Stump, AIA, Vice President Design and Construction, joined Trinity in 2014 and currently manages due diligence, permitting, and construction activities in Trinity’s New York office. Additionally, he provides technical assistance for prospecting. Mr. Stump has more than 15 years of experience in the design and construction of mixed-use and residential developments. Prior to joining Trinity in 2014, Mr. Stump worked at Magnusson Architecture and Planning, PC for 8 years, overseeing the quality control department and planning, design, permitting and construction of multiple mixed-use affordable family and senior housing and educational projects. Mr. Stump is a registered architect with a focus on energy efficiency and accessibility and holds a Master’s-equivalent degree in Architecture from the Technical University of Berlin, Germany


John Todd

CFO & Head of Real Estate Underwriting, LEX Markets

John Todd is the CFO and Head of Real Estate Investment Banking at LEX Markets LLC, a venture-backed real estate securities marketplace. He has more than 25 years of experience in private equity and investment banking, serving as an investor and advisor in real estate transactions totaling nearly $30 billion.

Prior to LEX, Mr. Todd was the Founder and Managing Partner of Post Road Partners, a real estate investment, asset management and advisory firm. Prior to founding Post Road, he was a Director with Citigroup’s investment banking arm. He has also worked at Credit Suisse and Fidelity Investments. Mr. Todd has an M.A. from Brandeis University and an A.B. from The University of Chicago.


Lisa White, Moderator

Phius Associate Director

Lisa White has been with Phius since 2012. She led the building certification review team for seven years and is an instructor for Certified Passive House Consultant (CPHC®) training and WUFI® Passive energy modeling software training. She holds a degree in Environmental Sustainability with a minor in Architecture from the University of Illinois at Urbana-Champaign, and a Master’s in Energy Engineering from the University of Illinois at Chicago.

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Ms. White has a strong understanding of high-performance building design and how this is integral to the transition to a renewable energy grid. Her Masters’ thesis posed the question “What do Net Zero Buildings Cost the Grid?”, combining the concepts behind how building loads are shaped, how design techniques can alter that shape, and how that ultimately impacts the electricity generation resources needed to meet the load – all while considering the shift to more intermittent, renewable energy resources. Ultimately, this research concludes that energy conservation and demand response in buildings is a critical up-front investment to facilitate this transition.

At Phius, White works on the development of new and existing professional training courses and has delivered professional training to more than 800 students. She has taught introductory and advanced seminars at professional conferences and universities nationwide, including guest lecturing at the Harvard Extension School. She is a longtime member of Phius’ technical committee and was instrumental in the development of the Phius+ 2015 Climate-Specific Passive Building standard, followed by the 2018 and 2021 updates. Alongside standards development and research, White works directly with the Fraunhofer Institute of Building Physics to develop and implement new key features into the WUFI Passive energy modeling software that Phius uses for passive building certification. While in her previous role as Certification Manager, Ms. White reviewed and provided feedback on energy models, drawings, details, planned mechanical systems, etc. to more than 500 project teams working on passive building designs across the world.

Ms. White has written and co-authored many publications, the most recent being a cover-featured article in the ASHRAE High Performing Buildings magazine. She has presented at numerous national and international conferences on topics related to grid-friendly buildings, assessing resiliency and passive survivability, measured data for high performance and net zero buildings.