Recs & Ursula Jenkins née Müllecker are the initiators and administrators of the Birkenhördt Project. Both have been working on and off in the field of genealogy since 1990. They maintain their own family website and are also the initiators and administrators of another online project about the Soddy-Daisy area of Hamilton County, Tennessee called "the Soddy-Daisy Roots Project" which has been online since 2009.