He began working as a professional illustrator and writer in 1990 with "Holly Connick", a short story published in the magazine Fumo di China.
In 1991 in the magazine Intrepido he started collaborating with writer Michelangelo La Neve, signing some episodes of the series Dipartimento ESP among others.
In 1993 Alberti joined Sergio Bonelli Editore, working on the series Nathan Never and in 1994 won the Albertarelli prize with the episode "Il canto della balena".
Since 1995 he's also been working on the series Legs Weaver, again for Sergio Bonelli Editore, and in 1999 debuted in script-writing with "L'immortale", of the same collection.
In 2000 Alberti teamed up with Luca Enoch to co-write a project for the French market: Morgana, published since 2002 by Les Humanoides Associes.