Help Make Passive Building Mainstream Support PHIUS


Christopher Baylis

System Administrator

Christopher Baylis joined PHIUS 2018 as the system administrator, where he provides technical support for members, students, and staff, along with managing the online training platforms and websites. He has over 10 years experience working in technical support, graphic design, and film media.

Baylis holds a Bachelor of Arts in Film from Columbia College Chicago.

Jennie Eber

Alliance Constituent Coordinator

Jennie serves as the Alliance Constituent Coordinator, supporting members and chapters across the country. She works closely with members to ensure they receive the best possible benefits of being part of PHIus. Prior to joining PHIus, Jennie worked in Development for a local tax assistance organization after moving from Philadelphia where she worked in membership organizations supporting volunteers and communications across internal and external platforms. She has over ten years of experience in nonprofits.

Jennie has a Bachelor’s degree in Liberal Arts from Kalamazoo College as well as a Master’s degree in Public Administration, nonprofit management from George Mason University.


Isaac Elnecave

Project Certification Reviewer

Isaac Elnecave joined the PHIUS Certification Team in 2019  where 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.  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 Bachelors 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.

Michael Franco

Product Certification Program Coordinator

Michael Franco joined PHIUS in October 2020 as the Product Certification Program Coordinator. Prior to joining PHIUS, Michael worked as an account manager for an MRO distributor in the industrial sector. He holds a B.S. in Business Administration from Chapman University and an M.S. in Project Management from USC.  

Katrin Klingenberg

Executive Director & Co-Founder

Katrin is the executive director of the Passive House Institute US (PHIUS), Chicago, Illinois, USA. PHIUS is an organization committed to making high-performance passive building the mainstream market standard.

After studying at the Technische Universitaet in Berlin, Germany and graduating from Ball State University in Muncie, Indiana with a master’s degree in architecture in 1996, Katrin began her career in architecture with Murphy/Jahn in Chicago, Illinois. She then worked for the architecture firm Solomon Cordwell Buenz in Chicago. In 2002, she started her own firm and became a registered architect in Germany.

In 2007, Katrin co-founded the Passive House Institute US to work on education. She is the executive and the lead instructor for the PHIUS Certified Passive House Consultant (CPHC) training. She also directs the technical and research programs at PHIUS which has trained over 2,000 architects, engineers, energy consultants, energy raters and builders in passive building standards. PHIUS has become the leading passive building research and information provider in North America.

Katrin has written and co-authored magazine articles and book contributions. She has also presented internationally on the topic of passive building science and won the Woman in Sustainability Leadership Award in 2015.


Michael Knezovich

Communications Director

Michael Knezovich serves as PHIUS Communications Director. Knezovich’s career has spanned journalism, technical writing, and marketing communications. He was part of a startup team that transformed Spyglass, Inc. from a scientific data visualization software company to an Internet software company, and helped lead a successful IPO. He served as managing editor of CU Cityview, an alt-weekly newspaper based in Champaign-Urbana, Ill. At PHIUS, he has coordinated the Annual North American Passive House Conferences, and manage online communications and public relations. He holds a B.S. and an M.S. in Journalism from the University of Illinois at Urbana-Champaign.

Max Lapthorne

Marketing Communications Specialist

Max Lapthorne joined PHIUS in May of 2021 as the Marketing Communications Specialist. Prior to joining Phius, he worked as a Digital Marketing Specialist on an in-house marketing team in Hoffman Estates where he spearheaded the launch of a new loyalty program. He also previously worked as a newspaper editor for 22nd Century Media in the Southwest suburbs of Chicago.

Max has a Bachelor’s degree in Journalism from Michigan State University

Tony Lisanti

Project QA/QC Manager

Tony, lives in Rockland county, NY a suburb just north of New York city. He has an Associate’s Degree from S.U.N.Y. Alfred in Internal Combustion Engine Engineering Technology, a Bachelor’s of Science Degree in Mechanical Engineering from the Rochester Institute of Technology, and a Master’s of Science Degree in Organizational Leadership from Mercy College.

He has been employed as a Mechanical Engineer with a consulting engineering firm in Rye, NY; as a Maintenance Specialist and Account Executive with Con Edison, as Director of Energy Sales and Service for Robison Energy in Westchester County, NY and currently as Managing Director at Integral Building & Design, Inc.

In 2003 he became a Certified Home Energy Rater and began assisting homeowners, builders, developers, and contractors in meeting current Energy Code, Energy Star Homes and many other high performance building requirements. He has over 2000 dwelling units certified for the EPA Energy Star Program, and completed many other Ratings for code compliance, EPA Indoor airPLUS, DOE ZERH and PHIUS+. He has worked with several municipalities in NY State including the NY Dept. of State in developing higher energy code standards.

Other qualifications include Certified Energy Manager (C.E.M.) Passive House Rater, Verifier and Passive House Consultant, D.O.E. Zero Energy Home Verifier, RESNET Quality Assurance Designee, RESNET Rater Trainer, Certified Green Professional by the National Association of Home Builders and numerous certifications from the Building Performance Institute.

He serves on the Board of Directors of the Passive House Alliance - Hudson Valley Chapter, participates on several RESNET working groups, the Rockland Business Association Green and Commercial Real Estate and Development Councils, Timberline Condominium Home Owners Association and previously was Vice-President of the North East Home Energy Rating System Alliance.

John Loercher

Project Certification Reviewer

John Loercher joined the Phius certification team in 2021. He provides design review, updates our existing CPHC training curriculum and helps expand the advanced training offerings at Phius. Prior to joining the certification team, John has been an active CPHC since 2016 and has certified all building types ranging from single-family and multi-family residential, commercial, new construction and retrofits. He is a Certified Passive House Consultant and holds a masters of architecture from Parsons the New School for Design.

He is currently on the advisory board of the Phius Alliance - Hudson Valley chapter and serves as the Secretary and Northeast Regional Representative for the national Phius Alliance chapter.

Al Mitchell

Project Certification Reviewer

Al Mitchell joined the PHIUS team in July 2020 to aid in technical capacities, ranging from research to project certification. He holds degrees in architectural engineering and architecture from Illinois Tech and Ball State University respectively.

James P. S. Ortega, RA

Project Certification Manager

James Ortega is the Project Certification Manager for the Passive House Institute US (Phius). Prior to taking over this role in 2019, he served as a Project Certification Reviewer.

He provides design review and energy modeling services to evaluate project qualifications for Phius Certification. Ortega works closely with the submitting CPHC 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, acts as a CPHC trainer and  gives presentations on passive design principles and projects at various conferences.

Ortega is also a licensed architect in the state of Illinois and enjoys spending time with his wife and two cats in his free time.

Andres Pinzon, PhD

Project Certification Reviewer

Andres Pinzon joined PHIUS in 2017, and he has been a member of the Certification Team since January 2018. In that time he's worked on research and development of projects related to energy standards in residential buildings.

Pinzon holds a BArch from Universidad de los Andes (Bogotá – Colombia, 2002); an MSc in Building Sciences from Delft University of Technology (Delft – The Netherlands, 2008), and a Doctoral degree in Architecture from Illinois Institute of Technology (2017) as a Fulbright Grantee.

In addition to his work as a scholar, Andres has researched the thermal comfort in passive buildings, particularly those with transitional spaces such as courtyards.

Steven Reid-Wynn

Office Administrator

Steven Reid-Wynn joined PHIUS in June of 2020 as the office administrator, where he supplies administrative and financial support for the staff. Prior to PHIUS, he has worked as an Accounting/Finance Manager for an IT staffing firm and Bookkeeper/Office Manager for a local startup. He has over 20 years' experience working within accounting departments, office management, and operations. He studied Accounting at Kentucky State University and Lincoln University found in Jefferson City, Mo.

Josh Ruedin

Professional Training and Education Programs Manager

Josh Ruedin joined PHIUS in January as the Professional Training and Education Programs Manager. He oversees live and on-demand training offerings and works closely with stakeholders and subject matter experts to ensure that PHIUS’ certification trainings and continuing education offerings provide quality learning opportunities. He has worked as a high school English teacher, managing continuing education programs for radiologists, and directing online safety and health trainings for frontline construction and industry workers. Josh holds a Bachelor of Arts in English and a Master of Arts in Teaching from Southern Illinois University, Carbondale.

L. David Stewart, PhD-c


L. David Stewart, is a Marketing & Communication Strategist for Phius. A native of Chicago. David's role is to develop strategies to expand the reach of Phius through various digital channels. His background includes a B.A. in Architectural Studies from UIC. A  master's in real estate from Roosevelt, and a MBA from AIU. Currently David is looking to defend his dissertation, to complete his Doctorate at National Louis University.

When not doing all things academic and strategic, David is an avid lover of jazz, roller skating and photography.

Lisa White

Associate Director

Lisa White serves as the Associate Director for the Passive House Institute US (PHIUS) and has been with PHIUS since 2012. Prior to this role, she led the certification review team. She is an instructor for Certified Passive House Consultant (CPHC®) and WUFI Passive software training. White 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.

White works on certification, training, and WUFI Passive development and is a member of PHIUS’ technical committee. She also provides consulting services on static and dynamic energy modeling in WUFI Passive, THERM modeling, and project planning specific to passive building principles. White has presented at numerous conferences and events, including Greenbuild, ASHRAE, PHIUS Annual North American Passive House Conferences, the Affordable Comfort Institute national conference, and Facades+.

Graham S. Wright, PhD

Senior Scientist & Chair of the Technical Committee

Graham Wright earned his Ph.D. in Electrical Engineering at the University of Illinois in 1993. After a 10 year career in the printing industry, he refocused his work on energy efficiency and renewable energy in 2007. He first volunteered with Americorps VISTA and then trained as a Passive House Consultant in 2008. He worked as an independent consultant, became licensed as an instructor for the PHIUS Certified Consultant Training in 2011 and began working for PHIUS in 2012 as a building scientist. He leads standards, certification and energy modeling protocol development at PHIUS, sets the research agenda for the Technical Committee and co-authored the PHIUS+2015 Passive Building Standard developed in 2015 in cooperation with Building Science Corporation under a Department of Energy grant. It is the only passive building standard of its kind in the world that is based on bioclimatic design guidelines and energy targets. Graham also develops and manages PHIUS's product certification programs.

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