[1] In 2003, he won a Grammy Award for his work as a sound engineer and musician on the album Soy with Latin singer Alejandra Guzmán.

His career in the music industry spans several decades, dating back to when he was just a teenager running his own recording studio in Weymouth, Massachusetts.

During that time, he became known as one of the "Boneyard Boys," a small, tight-knit group of producers and collaborators involved in Aerosmith's creative process when recording albums.

His work on those recordings eventually gained him recognition in the music world and led to collaborations with other artists and producers in studios from Los Angeles to London.

His collaborators range from Ozzy Osbourne[3] to Michael Bolton,[4] Alejandra Guzmán[5] to Jonny Lang, as well as Eric Carmen,[6][7] Cheap Trick, Neko Case, Steve Smith,[8] Bon Jovi, LeAnn Rimes, Santana, and the Backstreet Boys.

[12][13] Along with Santo, Mark Hudson is also a member of the infamous "Boneyard Boys,"[14] the small group of songwriters, musicians, and music producers responsible for Aerosmith's creative process.

He also received a nomination that year for the Grammy Award for Best Rock Performance by a Duo or Group with Vocal[19] for his work on "Jaded,"[20][21] which was a major Top 10 hit in the United States and around the world.

[25] The TEC Awards, often referred to as the "Oscars" of the pro audio and sound recording industry, honor creative luminaries such as Les Paul,[26] Quincy Jones,[27] Pete Townshend,[28] Stevie Wonder, and many other notable artists for their historical and influential contributions to the music world.

They quickly formed a friendship, which eventually led to Santo working as the personal sound engineer for both Steven Tyler[29] and Joe Perry.

for Geffen Records, he was brought in as a member of the creative and production teams, working on various aspects of the process from sound engineer to session musician.

His work also earned him a spot as a member of the “Boneyard Boys,” a tongue-in-cheek name for the small group of collaborators behind the band's creative process.

He has helped me and Joey (Kramer) with preparing our bass and drum parts... During the writing process: Steven [Tyler], Joe [Perry], Marty Fredrickson and Mark Hudson would be recording, as they wrote, and these cool little demos would come out... Then, they would send them around to the rest of us.

A new addition to the group was a young and relatively unknown German vocalist named Hagan Grohe, discovered on YouTube by Joe Perry's wife, Billie.

[32] The band opened for national acts like Bad Company[33] and Mötley Crüe, and also made an appearance as the musical guest on Late Night with David Letterman,[34] performing "Slingshot" from the album.

Hudson, in turn, brought in Paul Santo, with whom he had previously worked on an Aerosmith album, as part of the production team.

Santo, working as the sound engineer, split his time between recording at Starr's studio in London, Rocca Bella, and Hudson's Whatinthewhatthe?

"[42] Following the 2004 Indian Ocean tsunami that devastated Southeast Asia,[43] Paul Santo joined an all-star cast of musicians that included Elton John, Rod Stewart, Steven Tyler, Ozzy Osbourne, Phil Collins, Ringo Starr, Gavin Rossdale, Gwen Stefani, Mary J. Blige, Pink, Kelly Osbourne, Katie Melua, Josh Groban, Andrea Bocelli, and members of Velvet Revolver: Slash, Duff McKagan, Matt Sorum, Dave Kushner, and Scott Weiland.

[49] Unfortunately, due to a family member undergoing major surgery, Aerosmith guitarist Brad Whitford was unable to perform with the band at the event.

On very short notice and without any time for rehearsal, Paul Santo, who lives in the Boston area, stepped in with Aerosmith (who had just returned from a show in Singapore the day before) and took Whitford's place on stage with the rest of the band.