In fact, in 2004, they worked collectively on compositions like Edge of Forever's Feeding The Fire,[4] which also featured Bob Harris from Frank Zappa and Axe and in 2005 on second album Let The Demon Rock And Roll.

[5] In 2006 Alessandro was called to sing, play Hammond organ and keyboards in the Moonstone Project first album Time to Take a Stand featuring Kelly Keeling, Graham Bonnet, Glenn Hughes, James Christian, Carmine Appice, Paul Shortino, Steve Walsh, Ian Paice, Tony Franklin and Roberto Tiranti.

In the same year he was in the Moonstone Project second album Rebel on the Run with artists as Clive Bunker, James Christian, Robin Beck, Roberto Tiranti, Glenn Hughes, Ken Hensley and Ian Paice.

[20][21][22] In 2014 he produced, wrote, recorded, played keyboards, mixed and mastered the eponymous album of supergroup Rated X formed by Joe Lynn Turner, Karl Cochran, Tony Franklin and Carmine Appice.

[23][24][25] In January 2015 Frontiers combined the skills of Alessandro with German bass player and producer Mat Sinner for the Level 10 record with Symphony X singer Russell Allen the album Chapter One with Randy Black on drums, Alex Beyrodt and Roland Grapow (ex-Helloween, Masterplan) on guitars.

[26] Alessandro continued his collaboration with Sinner and Beyrodt with David Readman (Pink Cream 69) on vocals and Francesco Jovino on drums on Voodoo Circle album Whisky Fingers released in November.

[36] In 2017 Mat Sinner asked Alessandro to become one of the singers of the massive production of "The Original Rock Meets Classic", featuring the likes of Don Felder, Steve Lukather, Rick Springfield, Francis Rossi among many others.

On June Sunstorm returned with the new The Road to Hell[47] with Edo Sala on drums (Folkstone) and on July he produced, wrote, played keyboards on, recorded, mixed and mastered Set The World On Fire[48] for Johnny Gioeli and Deen Castronovo project, both on vocals.

On May Alessandro recorded for Lords of Black Spanish guitar player the Restless Spirits' eponymous album with collaboration of Johnny Gioeli, Diego Valdez, Dino Jelusić and Deen Castronovo.

In the same mouth Alessandro (writing, producing, recording, playing bass guitar and keyboards on, mixing and mastering) released Lovekillers' eponymous album featuring TNT singer Tony Harnell.

In the meddle of the year Alessandro were involved on songwriting, keyboards, bass and producing in a hard rock project of Canadian singer Rosa Laricchiuta called Black Rose Maze with Italian musicians Andrea Seveso and Michele Sanna.

At the same time Alessandro produced, mixed, mastered and play keyboards and bass on new album Little Bang Theory for the new project Poison Rose with Marco Sivo on vocals, Aldo Lonobile and Andrea Seveso on guitars, and Edo Sala on drums.

In the same mounth Alessandro collaborated in the new supergroup project called Skills with Renan Zonta of Electric Mob on vocals, Brad Gillis on guitars, Billy Sheehan on bass and David Huff of Giant on drums with the album Different Worlds on which he played keyboards and produced, mixed and mastered.

On June Alessandro took part on the new project Iconic with Nathan James of Inglorius on vocals, Michael Sweet and Joel Hoekstra on guitars, Marco Mendoza on bass and Tommy Aldridge on drums.

On November Alessandro took part in the new project Enemy Eyes with Johnny Gioeli (Hardline) on vocals, Marcos Rodriguez (ex-Rage) on guitars and Fabio Alessandrini (Annihilator) on drums with their album History's Hand.