Sean is the principal of Heritage Green Consulting, a preservation consultancy working at the intersection of historic preservation and sustainability.  He brings particular attention to how sustainability policies impact the preservation of historic buildings and how to craft these policies to limit harm and even benefit historic buildings.  His work at Heritage Green is built on a career at the forefront of sustainability and decarbonization codes and policy.  He was formerly an Associate Director at New Buildings Institute where he was the subject matter expert on existing buildings for NBI’s work in energy codes, decarbonization policy and building performance standards. 

He earned a Bachelor’s Degree in Architecture with a minor in Architectural History at the University of Oregon and a Master’s Degree in Historic Preservation at the University of Pennsylvania. 

Frank Heitzman, AIA, Heitzman Architects
Oak Park, Illinois

Mike Jackson, FAIA, Co-chair, APT Technical Committee on Codes and Standards
Springfield, IL

Mike Jackson, FAIA is an architect in Springfield IL. He was the Deputy State Historic Preservation Officer (SHPO) in Illinois from 2010-2014 as part of a thirty-one career in public service.  He is a member of the Association for Preservation Technology (APT) and is co-chair of the Technical Committee on Codes and Standards and director of the APT Building Technology Heritage Library. He was a visiting professor of architecture at the University of Illinois at Urbana-Champaign.  He is a principle in Upstairs Downtown, a nationally recognized training program encouraging redevelopment of older properties on America’s Main Streets. He is the board president of the National Building Arts Center, a new museum with an impressive collection of architectural artifacts.

Marilyn Kaplan, FAPT, Co-chair, APT Technical Committee on Codes and Standards, Preservation Architecture
Albany, NY 

Marilyn Kaplan is the Founding Principal of Preservation Architecture in Albany, NY and a Fellow of APT. She has served as the founding co-chair of the APT Technical Committee on Codes and Standards, and on various committees of the International Code Council's International Existing Building Code and, previously, the National Fire Protection Association's Committee on Cultural Resources. She is the author of Preservation Brief 51:  Building Codes for Historic and Existing Buildings published by the National Park Service in 2024.   She is currently leading the APT Technical Committee's effort, funded through the National Center for Preservation Technology and Training, to review the historic building provisions of the model codes and develop recommendations for consideration at the national codes and at local and state jurisdictions.

Thomas Newbold, PE, CEM, CGD, LEED, President, Landmark Facilities Group, Inc.
Norwalk, CT

Tom is a founding member of the LFG from its inception in 1988. He holds an MBA from the University of Connecticut and a Bachelor of Science from Washington University. He is a licensed professional engineer in 23 states. Tom has over 35 years of engineering experience and shares this knowledge throughout the firm. He is especially adept at all aspects of HVAC controls including hardware, software and coding. Tom is an active member of the Association of Preservation Technologists and participates in many of their sanctioned events. As a Certified Geothermal system Designer, he has taught several classes on the subject and utilizes this technology in his own home. Tom is a resident of Trumbull, CT where he resides with his wife and two dogs.

Chris Rute, AIA RIBA, Principal, CR Design 
Milwaukee, WI

Chris is a licensed Architect and began his career in architecture after graduating from the School of Architecture and Urban Planning at University of Wisconsin – Milwaukee. He has worked in traditional architectural offices, design-build firms, and corporate architecture. His career path pivoted to code official for the City of Milwaukee. Chris teaches building code classes at the university. Chris is now the principal at CR Design providing code consultation and preliminary code review services and assistance architects and developers navigate through the plan approval and permit processes. Chris is passionate about Historic Preservation and Adaptive Reuse of Historic Buildings.