By 1986 he had formed his band Vision with college friends and caught the eye of White Light Productions, a record label led by Lucille Hunt.
The musicians were a mixture of Guerrero's college-age friends and industry professionals, including Grant Geissman, Merry Clayton, and Max Bennett.
Upon its release in 1988, Tiara ended up with a minor hit, "L.A.'d", that started receiving airplay on jazz radio stations around the country, most notably WNUA in Chicago, where the song would remain a staple for many years to come.
Different Places featured musicians Brian Bromberg, Richard Smith, Norman Brown, Bill Cantos, Brandon Fields and many other contemporary jazz notables.
Another Day, Another Dream would lead to more national and international touring dates and established Guerrero as a recognized voice in the early smooth jazz market.
The album featured guests artists such as Gerald Albright, Mike Garson, Rob Mullins and more, performing along with Guerrero's band.
In 1991 and 1993, Guerrero was a featured headliner at the CanCun Jazz Festival, sharing the stage with legends such as Nancy Wilson, Joe Sample, Wynton Marsalis and more.
Over the years, Guerrero has also recorded duo albums (with Bill Cantos and Frank Giebels) and band projects featuring his side groups, The Hi-Fi Quintet and West Coast Sound.
These albums were followed by national tours (for which Guerrero held the solo trumpet chair with a 12-piece big band) and a well-received PBS special.
The song was released on Valentine's Day and also featured Arlene's real-life husband, Dick Van Dyke, whom Guerrero had previously worked with.
2024 saw the release of "Duo Tones", an album of jazz duets featuring Guerrero and pianist, Jeremy Siskind on the MetaJAX record label.
Guerrero was the founder and host of the KSBR Birthday Bash, one of Southern California's leading contemporary jazz festival events.
Beginning in a small room at the former Dana Point Resort, this unique concert (the headlining artists come without their bands and play each other's music in an unrehearsed jam session format organized by Guerrero) grew to an audience of thousands and attracted contemporary jazz artists like Joe Sample, Larry Carlton, Tom Scott, Chris Botti, Patti Austin and many more over the years.
In 2015 a new arrangement of "This Baby Boy" was premiered at Carnegie Hall in New York City, and the Indianapolis Symphony included the song (along with his "A Swingin' Little Christmas Time") in their 2017 Yuletide program (with Sandi Patty singing).
From 2002-2008, Guerrero produced the popular yearly SongSeeker albums which introduced new songs from unknown writers to the church market at large.
In 2007, Guerrero founded and continues to serve as president of FACT Alliance, a charitable organization which seeks to provide aftercare for victims of Human Trafficking and Sex Slavery both in the United States and Internationally through their Let's Respond campaign.