Marco Tulio Ciani Barillas (born March 7, 1987, in Guatemala City, Guatemala) is a Guatemalan footballer who plays as a midfielder.
Ciani was signed by SM Arica in June 2014. He made his debut on July 19 in the season opener against Colo Colo, coming off the bench for Kevin Harbottle.
In March 2022, Ciani joined CSD Agua Blanca.