Guido Marini was born 31 January 1965. Is the Master of Pontifical Liturgical Celebrations (It. Maestro delle Celebrazioni Liturgiche Pontificie). He was appointed to this post on 1 October 2007, replacing Piero Marini (no relation). Guido Marini previously served as Chief Liturgist for the Archdiocese of Genoa.
Marini was ordained on 4 February 1989 by Cardinal Giovanni Canestri. He earned a doctorate in the "psychology of communication" in early 2007, in addition to an earlier JUD -- a dual award in canon and civil law from the Pontifical Lateran University.
From 1988 to 2003 he served as the secretary to the archbishops of Genoa, Cardinals Canestri (until 1995), Tettamanzi (until 2002) and Bertone.
Marini has received praise for returning traditional elements of the church's liturgical history to the Papal Masses and other liturgical celebrations.
Data from wikipedia.