After establishing a strong following in Australia, Grayson toured Europe and the US extensively. 

During his tour of Europe in 2008, Grayson secured a contract with Rifle Range Records and moved to Ireland at the beginning of 2009.  He spent most of the year recording his debut album, “Somewhere in the Night.”  The release of Grayson’s first single, “Stand Clear” put him on the Top 40 Commercial charts and the single reached #1 on the Indie Download charts in Ireland. In Australia, the release of Grayson’s second single entitled “Change” reached #1 on the official Aria physical singles charts, as well as Number 8 on the Aria Hit Seekers chart.

In late 2009, Grayson continued his Europe tour with some of the biggest names in Irish music, and also performed in his own sold-out solo shows.  Returning to Australia in 2010, Grayson toured with Jimmy Barnes, The Whitlam’s and Vanessa Amorosi.  He recorded his second full-length album, “Chronology” in July 2010 and concluded the year touring the USA with continued success.

Grayson relocated to the US in 2011 and currently resides in Nashville, Tennessee.  Since making America his new home, Grayson has continued developing his talents as an artist and widening his fan base.  Grayson has played over 100 venues and has been featured at American music festivals including, "Wildlife West Music Festival" and the historic "Woodstock Folk Festival.” 

The documentary “66 Days on Route 66”, which won the Gold Award at the 2011 Cinerokom Film Festival in LA, captures Grayson’s 66 performances on tour in the US over the course of 66 days on Route 66.  The journey chronicled his discovery of the behind-the-scenes America, and his own self-discovery, as he learned more of who he really is, as a musician, as a visitor, and as a human being. Through a series of vignettes and short-take interviews, Grayson shares his perspective and views of the American Dream, Route 66, and not just what he is offering to America through this tour, but what he believes America offers him in return.

In 2012, Grayson signed a publishing, album, and management deal in Nashville with Busy at Play Publishing, owned and operated by Garth Brook's guitar player, Johnny Garcia. 

Grayson’s third studio album, “Little Doors” was recorded in 2013.  Prior to releasing the album, Grayson spent a month driving from town to town across 10 different US states performing the first single "You and America,” live on 50 radio stations.  It peaked at number 3 on the Play MPE American Country Radio charts in September 2013. The album was an instant success, reaching number 16 on the iTunes album chart.  “Time Machine,” the second single, was released in April 2014 followed by another cross-country radio tour.  It climbed to number 5 on the Play MPE radio charts in both the US and Australia.

For his fourth studio album, Grayson co-produced “Broken Hearts andamp; Broken Bones” with John Willis of Willisoundz.  Willis has been honored with the “Guitarist of The Year” award from the Academy of Country Music and is one of the most in-demand guitar players and producers in country music.  The album was released in August 2015.  Grayson traveled 10,000 miles visiting radio stations in 15 states for live on-air performances and interviews, as well as live shows.  The first single, “Yes” reached number 3 on the Play MPE charts and was followed by the release of the second single “Winter” in November 2015, which landed at number 7 on the Play MPE charts.  Both singles continue to receive high rotation air play across American radio stations.

May 2016 saw the release of Grayson’s next single ’10-9-87’ a more up-tempo sing than that of his other music, yet still typically with a Grayson sound. ‘10-9-8-7’ hit the #1 spot in October 2016 on the New Music Weekly charts in the US – a radio chart that tracks commercial radio play.

Following the release of ’10-9-8-7’ Grayson embarked on his 4th Radio promotion tour for 4 weeks across the USA visiting over 25 Music Row and Grassroots Radio Stations for live on air music performances and interviews.

’10-9-8-7’ saw success in Australia across December 2016 and January 2017 hitting #12 on the Australian Country Radio airplay charts.

In addition to writing and recording his own music, Grayson is a highly sought after producer and guitar session player in Nashville working in conjunction with studios in Nashville including Five Points Recording (formerly Yellow Hammer Studio).  He is known in the recording studio for his technical abilities as a guitarist, as well as his sharp ear and talent creating moving melodies and powerful arrangements for other artists turning bedroom demo’s into radio ready masterpieces.

Between 2015 and 2020, Grayson has produced, arranged and played on over 70 projects for other artists across all musical genres.

 2018 saw the release of his next single ‘Margarita’ to Australian and US Country Radio which received high rotation across both countries and play across the Countery Music Channel in Australia.

 2020 saw the release of Grayson’s 5th studio Album ‘Window Dreams’ with the first single ‘Beermuda Triangle’ released April 2020 right at the start of Covid lockdowns. Unable to travel, Grayson did multiple live radio interviews in both Australia and the USA to promote the single.

Grayson was back bigger than ever in 2021 with a new single ‘Unsolved Mystery’ distributed via the Sony Orchard label. ‘Unsolved Mystery’ is currently climbing the Music Row Radio Charts and sitting at number 88 as of July 2022. A new album is in production and coming soon. 

Grayson is also working on a new project ‘Skwishy For Kids’ which is an animated music video series for kids. Along with writing original music for the project, Grayson is the lead musical director of the project and there are currently 100 songs in the works coming soon.