A dedicated philanthropist, Marchesino Daniel de Petri Testaferrata first joined the Sovereign Order of Malta as a youth volunteer before officially accepting an invitation to the Order in 1998. He was elected to its Council shortly afterward, before accepting the role of chapter president in 2015. He continues to coordinate some of the Orders charitable activities, notably the annual Lourdes pilgrimage supporting more than 300 pilgrims. He is a member of the Assembly of the Maltese Nobility, and serves as its delegate among the Commission d'Information et de Liaison des Associations Nobles d'Europe (CILANE). He is also a member of the Board of Administrators of the Malta Community Chest Fund Foundation. Daniel is a director of his family’s group of companies and is a member of the Mdina Rehabilitation Committee. He is married to Enyd née Pisani and they have a son, Gregorio Augusto.