De Pusy Lafayette is a member of multiple civic and lineage societies including the American Friends of Lafayette, the Ordre de La Fayette Auvergne, and the Rochambeau Chapter of the Daughters of the American Revolution.[2][3] She served as the Rochambeau Chapter NSDAR's registrar.[4]
De Pusy Lafayette was selected as an ambassador for The 200th Bicentennial of Lafayette's 1824-1825 Farewell Tour in the United States, becoming the first female descendant of the Marquis de La Fayette to be honored.[2] De Pusy Lafayette and two of her daughters, Heloise and Adelaide Barbier-Dumottier de Lafayette, kicked off the tour at a celebration in New York City, attending an official dinner on Staten Island.[5]
As part of the tour, she visited the Tomb of George Washington at Mount Vernon on 12 August 2024, where she met with a descendant of James Armistead Lafayette.[2] Later that month, she and two of her daughters attended the 200th anniversary of the Marquis de La Fayette's tour to Greenwich, Connecticut at the Greenwich Historical Society.[1]
De Pusy Lafayette made an official visit to Lafayette College in 2025 meeting with the college's president Nicole Hurd and attending the final performance of The Lafayette Musical & Immersive Bicentennial Tour, for which she served as an ambassador, at Williams Center for the Arts.[2][6] In August 2026, she made an official visit to The Huguenot Society of America in Charleston, South Carolina.[3]