Board of Advisors

Freddie Bittenbender, Shickshinny
Mary Werner DeNadai, FAIA, Chadds Ford
Diane Shafer Domnick, Ph.D., Meadville
Stephen A. George, FAIA, Bedford
Carole F. Haas Gravagno, Philadelphia
Thomas B. Hagen, Erie
Thomas Hylton, Pottstown


Robert A. Kinsley II, AIA, York
Janet Klein, Rydal
John A. Martine, AIA, Pittsburgh
Robert Pfaffmann, AIA, Pittsburgh
A. Roy Smith, West Chester
Paul Steinke, Philadelphia
David L. Taylor, Brookville

Nathaniel Guest

Nathaniel Guest, Esq., Board Chairperson

Nathaniel C. Guest is an attorney and preservation advocate. Guest is the founding director of the Keystone Marker Trust, a statewide nonprofit dedicated to enhancing community gateways through Pennsylvania’s iconic roadside markers. In 2008, he founded the Pennhurst Memorial & Preservation Alliance to facilitate reuse of the former Pennhurst State School, an International Site of Conscience.

A steam locomotive engineer, Guest founded the Colebrookdale Railroad Preservation Trust to restore a Civil War-era rail line in southeastern Pennsylvania. He has served as an intern with the National Trust for Historic Preservation's legal department; director of the Cornell Tradition, a multimillion dollar fellowship recognizing volunteer service; Tompkins County, New York, Human Rights Commissioner; and an elected representative on the Cornell Employee Assembly. He is a director for Preservation Pennsylvania and the Schuylkill River National and State Heritage Area, and serves as the Preservation Programs director and National Heritage Grants chairman for the National Railway Historical Society, the nation’s largest railway preservation organization.

Guest lectures on topics pertinent to preservation, including law, economics, advocacy, fundraising, and ethics. He received his B.A. from Cornell University in 1994 (magna cum laude), his J.D. from Temple University in 2010 (cum laude), and his M.A. in historic preservation planning from Cornell University in 2012.

Jane Sheffield, Vice-Chairperson

Jane Sheffield holds an undergraduate degree from Duke University in Economics and Psychology and a Masters in Landscape Architecture from NC State. She has worked as a historic preservation consultant, Main Street Manager, and statewide historic preservation organization executive director.

As the Executive Director of the Allegheny Ridge Corporation, manager of the Allegheny Ridge Heritage Area, she has forwarded many initiatives including sustainable public/private partnerships, curriculum development and education outreach, and regional landscape projects including the Main Line Canal Greenway which co-aligns with the September 11th National Memorial Trail in central PA.

She is the current President of HeritagePA, the Commonwealth’s statewide association of heritage areas.

Sandra Rosenberg, Esq., Secretary

Sandra Lee Rosenberg joined the Preservation Pennsylvania board in 2017. She practices construction and real estate law as Corporate Counsel for Post Commercial Real Estate, a developer of multi-family housing in Philadelphia. Sandy began her career researching historic buildings for architectural resources surveys in New Haven, CT and Worcester, MA.

For more than 25 years she managed commercial and institutional construction projects for general contractors and worked as an owner’s representative for organizations including Project H.O.M.E. where she helped develop affordable housing.

Ms. Rosenberg served six years on PHMC’s State Historic Preservation Advisory Board, two years as Vice-Chair. She was President and a seven-year board member of the Friends of High School Park. Sandy has ventured to Alaska, Hawaii and eight other states as a parent volunteer for BSA Troop 116. She earned her LEED AP certification and has been active in the green building community.

Ms. Rosenberg is a graduate of Yale University and the James Beasley School of Law at Temple University, and is admitted to practice law in Pennsylvania and New Jersey.

Scott Heberling, treasurer

Since 1985 Scott Heberling has been an owner and president of Heberling Associates, Inc., a cultural resource management firm based in Alexandria, Pennsylvania. A native of Huntingdon County, Scott earned degrees from
Gettysburg College, the University of Delaware, and the University of Massachusetts/Boston prior to a three decade career as a historian and archaeologist working throughout central and western Pennsylvania and adjoining states.

He has directed archaeological investigations at many of the Pennsylvania Historical & Museum Commission’s premier historic sites, including Old Economy Village, Eckley Miners Village, Joseph Priestley House, Graeme Park, Fort Loudon, and Bushy Run Battlefield. He is especially interested in historic transportation systems (highways, railroads, canals), historic water power, and rural industry.

Scott served on the PHMC’s Historic Preservation Board for seven years and is now in his second term on the board of Preservation Pennsylvania. Scott has been proud to call Pittsburgh home for the past 30 years.

Peter Benton, AIA, Past Chairman

Peter Benton is a Principal with Heritage Strategies, LLC, a preservation planning firm established by three long-time colleagues that specializes in planning for historic communities, heritage areas, cultural landscapes, and historic properties.

Peter is a registered architect with thirty years’ experience in the design and execution of architecture and preservation planning projects. From 1984 to 2009, Peter was a Project Manager, Senior Associate, and Associate Director with John Milner Associates, Inc., during which period he had primary responsibility for the firm’s planning work. The primary focus of his work has been the recognition and respect for the character and historical evolution of buildings and the landscapes in which they are located.

Peter is a graduate of the University of Virginia and the University of Pennsylvania. He currently serves on the board of Preservation Pennsylvania and Preservation Action. Peter lives in Birchrunville, Chester County.

Andrea Lowery

Andrea Bakewell Lowery

Andrea Bakewell Lowery, a preservationist with more than 20 years of experience, serves as the Executive Director of the Pennsylvania Historical and Museum Commission (PHMC). Prior to that, she was chief of the agency's Division of Architecture and Preservation. She managed the budget for PHMC's capital improvements across the state and spearheaded the agency's master planning initiatives.

With more than 20 years of preservation experience, Lowery's portfolio includes managing the renovation and expansion of the Pennsylvania Lumber Museum, rehabilitation of historic structures at Old Economy Village, and refurbishment of The State Museum of Pennsylvania for its 50th anniversary, culminating in its placement in the National Register of Historic Places. She is currently managing the design of the new Pennsylvania State Archives in Harrisburg.

Lowery brings broad experience to the agency's diverse programs, having worked in both the private and public sectors as a preservation architect, architectural historian, and state preservation specialist. She has led a variety of projects, including assignments for the Architect of the Capitol, the National Trust for Historic Preservation, the US General Services Administration, and Yale University. Lowery holds a bachelor's degree in history of art from Bryn Mawr College and a master's degree in architecture from the Ohio State University

Jeffrey Marshall

Jeffrey L. Marshall, President of Heritage Conservancy in Doylestown, PA has been involved in land conservation and historic preservation for 40 years.  Marshall has been a frequent presenter at the Land Trust Alliance Rally and the National Trust for Historic Preservation Conferences and has been the keynote speaker at preservation conferences in Pennsylvania, Ohio and Kentucky.

A strong advocate of community outreach and engagement, he was selected for a Lifetime Achievement Award as the “2015 Ambassador of Bucks County” and was a 2014 recipient of a Visit Bucks County Annual Tourism Award. In 2003 he was the recipient of inaugural “Bucks County Preservation Legacy Award” created in his honor for the preservation of historic places and open spaces by the Bucks County Commissioners. He is the author of six books on Bucks County architecture and history.

Marshall serves on the Board of Directors of the National Barn Alliance and is a founding member and Past President of the Board of Directors of the Historic Barn and Farm Foundation of Pennsylvania. Active in land conservation as well, Marshall has been directly involved in the preservation of thousands of
acres in Pennsylvania and serves on the Pennsylvania Land Trust Association Board of Directors.

Valerie Metzler

Valerie Metzler

Valerie A. Metzler is a certified archivist with degrees in History and American Studies and has worked in the fields of archives and history since serving internships in 1976.

At the U. S. Army Military History Institute, she worked extensively with Civil War era personal papers and photographs. While at MHI, she became recognized as the expert to direct researchers in using military history sources for the study of social, architectural, and local history. Valerie moved to Illinois in 1984 to work in the newly-established corporate archives for Kraft, Inc. and was the lead archivist and conservator there.

Since establishing her own business, Valerie Metzler Archivist/Historian, in 1985, she has assisted scores of historical societies, universities, businesses and families around the United States to establish and maintain their archives.

Melinda Meyer

Melinda Meyer

Melinda Meyer has worked with and served the heritage and arts communities of Northwestern Pennsylvania for nearly 20 years. She is experienced as an historian, educator, project consultant, grant writer and nonprofit administrator.

As a public historian, Ms. Meyer speaks frequently on the history of Erie County and consistently pursues avenues to share local history with all audiences. She has experience developing public programming and walking and driving tours, collecting oral histories, designing and installing exhibitions and wayside interpretive signage, publishing, and coordinating special events like festivals and symposiums. Ms. Meyer has also taught museum studies and historic preservation
undergraduate courses.

Ms. Meyer has a B.A. in History from Penn State Erie, The Behrend College and a Master of Business Administration from Gannon University.

Nancy Moses

Nancy Moses

Nancy Moses is Chairperson of the Pennsylvania Historical & Museum Commission Board. She began her career as a Program Chief at the National Endowment for the Humanities and then went on to top management positions at WQED-Pittsburgh Public Broadcasting, the University of Pennsylvania's Center for Philadelphia Studies, and the City of Philadelphia.

As an independent consultant, and through her firm, Collaborations, Inc., Nancy Moses has helped clients create heritage tourism entities and digital learning labs; launch international, environmental and civic initiatives; and establish new philanthropies. Her clients range from government, foundations, and national cultural treasures to community-based heritage, economic development, and service organizations.

Nancy Moses is the author of Stolen, Smuggled, Sold: On the Hunt for Cultural Treasures (Rowman & Littlefield, 2015) and the award-winning book, Lost in the Museum: Hidden Treasures and the Stories They Tell (AltaMira Press 2008). She currently serves as a guest columnist for the Philadelphia Business Journal where she profiles influential women in her "Power Lunch" column.

Born and raised in Pittsburgh, Nancy Moses has lived in Philadelphia since 1976, where she has been active in numerous boards and civic initiatives. She holds Bachelors and Masters degrees in American Studies from The George Washington University.

Sarah Piccini

Sarah Piccini

Sarah Piccini has more than a decade of experience working with heritage organizations and historic sites. She is currently the Assistant Director of the Lackawanna Historical Society in Scranton. 

Sarah received a Bachelor’s degree in History and Communications and a Master’s degree in History from the University of Scranton. As a labor historian, she is interested in the dramatic conflicts that come with labor struggles. Sarah is the author of Framing Faith: A Pictorial History of Communities of Faith, outlining the histories of ten Diocese of Scranton churches that recently closed, and examining the importance of faith in the lives of the region’s early immigrant populations. She has also written The Story of Scranton, a companion text for a local history curriculum. She has also curated several exhibits, including 150 Years, 150 Objects, a celebration of Scranton’s 150th anniversary; Delicates and Dainties, an exhibit of Victorian lingerie; and various traveling exhibits.

Sarah currently serves on the board of the Pennsylvania Historical Association and is involved with the Main Street program in Scranton.

Rebecca Zeller

Rebecca Zeller

Rebecca Zeller is a Preservation Specialist with Warehaus in York, Pennsylvania. She provides historic preservation consulting on a variety of projects, specializing in securing federal and state historic preservation funding incentives.

Rebecca has experience preparing National Register nominations, Historic Structures Reports, grant applications, and historic tax credit applications. She also assists building owners in navigating historic preservation regulations at the local, state and federal level. Rebecca is particularly interested in how the preservation of historic buildings can revitalize struggling communities and promote sustainable development.

In addition to serving on the Preservation PA board, Rebecca is a member of the York Historical Architecture Review Board. She previously served as a member of the Preservation50 Next Generation working group.

Rebecca holds a Bachelor of Arts in History from Gettysburg College and a Master of Science in Historic Preservation from Columbia University.

Philip D. Zimmerman, Ph.D.

Philip D. Zimmerman is a museum and decorative arts consultant based in Lancaster, Pa. In 2016 he was named a Commissioner of the Pennsylvania Historical & Museum Commission.

A prolific author, teacher, lecturer, and appraiser, Dr. Zimmerman is a nationally-recognized authority on early American furniture. Publications include Harmony in Wood: Furniture of the Harmony Society (2010), Delaware Clocks (2006), and American Federal Furniture and Decorative Arts from the Watson Collection (2004).

Numerous articles (50+) and book reviews appear in periodicals such as American Furniture, The Magazine Antiques, and Winterthur Portfolio. Before forming his own business serving institutional clients and individual collectors in 1992, he was director of the museum collections division at Winterthur, executive director of the Historical Society of York County, and curator of the Currier Gallery of Art, Manchester, NH. He is adjunct faculty at New York University and has taught at Franklin & Marshall College and The Bard Graduate Center for Studies in the Decorative Arts.

Dr. Zimmerman holds a doctorate in American and New England Studies from Boston University and a masters degree from the Winterthur Program in Early American Culture at the University of Delaware.