In 2012 J&G was hired to repair the water damaged decorative finishes on the walls and ceilings of Milton S. Hershey's High Point Mansion.

High Point Mansion in Hershey, Pennsylvania was built in 1908 and was the home of Milton S. Hershey and his wife Kitty from 1908 to 1945 then later to the Hershey Country Club. It was declared a National Historic Landmark in 1983.

J&G principal, Jeff Johnson, lead the team in 2001 that conducted paint analyses and replicated and/or conserved much of the historic decorative finishes throughout the mansion. The preservation work included replicating the historic glazed and stenciled wall finishes in the Grand Stair Hall, hallways and Parlor and conserved the murals "the Story of Ivanhoe"  in the Billiards room.