Sherri Marsh Johns is the firm’s principal investigator. She has over 20 years experience in the fields of architectural research, cultural resource planning, historic preservation law compliance and historic restoration project management. For twelve years Ms. Johns taught historic preservation courses at Goucher College. She serves on the boards of directors of the Anne Arundel County Trust for Preservation Inc.; the Lost Towns Project, Inc.; the Chesapeake Bay Maritime Museum's "Friends" board; and as director of the Smith Island Cultural Center & Museum. She exceeds National Park Service professional standards as listed in 36 CFR part 61 for history and architectural history, and is proficient in interpreting the Secretary of the Interior’s Standards for the Treatment of Historic Properties.