In 1996, after starting his own record label and production company, Stir Music, Simon Townshend released several other albums including studio and live performances.
He joined The Who as a second guitarist for their Quadrophenia Tour in 1996 and 1997.
He later rejoined the band as a full touring member in 2002 and has played with them on each of their tours since.

Simon Townshend also joined Casbah Club in 2004, which included Bruce Foxton (Former bass guitarist for The Jam) and Mark Brzezicki (Former drummer for Big Country) and Bruce Watson (Former guitarist for Big Country), where he functioned as lead guitarist, lead vocalist and songwriter.

In 2006 Simon Townshend joined the European leg of The Who's tour, playing a support set with Casbah Club as well as performing with The Who (see The Who Tour 2006-2007).
Simon Townshend played rhythm guitar, mandolin, and performed backing vocals.

He played a modified Fender Stratocaster with P-90 pick-ups.
Simon Townshend also uses a signature guitar designed and developed by JJ Guitars in addition to their Retro Lux model.

His first credited collaboration with The Who involved participation as one of the supporting choralists for Ken Russell's film adaptation of Tommy which was released in 1975.

He also had contributed backing vocals to The Who's Endless Wire album in 2006.

On 11 August 2009 Simon joined Pearl Jam onstage at the Shepherd's Bush Empire in London for a performance of "The Real Me" from The Who's Quadrophenia album.

In the fall of 2009, he embarked on a tour of the US with Roger Daltrey and the No Plan B band.
The band continued touring in the spring of 2010, playing a number of dates in support of Eric Clapton.
Further tours in 2011 and 2012 followed, with the band performing a complete version of Tommy.

In February 2012, he began his own tour of the UK, in support of his new album which has been credited as his most impactful solo recording to date "Looking Out Looking In", which London's Daily Express rated 5/5, calling it "utterly compelling" and naming Simon Townshend "a genuinely original talent."

His live band for this contained Tony Lowe (guitar), Phil Spalding (bass), and Greg Pringle (drums), His live shows have been variously described as "supercharged" (New York Times), "irresistible" (Washington Post) and a "catharsis" (Los Angeles Times).
Billboard labelled him "impressive" and Goldmine affirmed, "truly enjoyable listening."
 In short, as London's Gig Guide said, "you would be a fool to miss him."

In the late summer and fall of 2012, he played with The Who on the Quadrophenia and More tour, which included a performance at the 2012 Summer Olympics closing ceremony.

In July 2014 at Milton Keynes Bowl he again joined Pearl Jam on stage to perform his song I'm the answer.

From 2014 to 2016, Townshend joined The Who on their 50th anniversary tour, The Who Hits 50!.
In 2018, he toured with Roger Daltrey, performing Tommy with local orchestras in the United States.
In 1996, after starting his own record label and production company, Stir Music, Simon Townshend released several other albums including studio and live performances. He joined The Who as a second guitarist for their Quadrophenia Tour in 1996 and 1997. He later rejoined the band as a full touring member in 2002 and has played with them on each of their tours since.
Simon Townshend also joined Casbah Club in 2004, which included Bruce Foxton (Former bass guitarist for The Jam) and Mark Brzezicki (Former drummer for Big Country) and Bruce Watson (Former guitarist for Big Country), where he functioned as lead guitarist, lead vocalist and songwriter.
In 2006 Simon Townshend joined the European leg of The Who's tour, playing a support set with Casbah Club as well as performing with The Who (see The Who Tour 2006-2007). Simon Townshend played rhythm guitar, mandolin, and performed backing vocals.
He played a modified Fender Stratocaster with P-90 pick-ups. Simon Townshend also uses a signature guitar designed and developed by JJ Guitars in addition to their Retro Lux model.
His first credited collaboration with The Who involved participation as one of the supporting choralists for Ken Russell's film adaptation of Tommy which was released in 1975.
He also had contributed backing vocals to The Who's Endless Wire album in 2006.
On 11 August 2009 Simon joined Pearl Jam onstage at the Shepherd's Bush Empire in London for a performance of "The Real Me" from The Who's Quadrophenia album.
In the fall of 2009, he embarked on a tour of the US with Roger Daltrey and the No Plan B band. The band continued touring in the spring of 2010, playing a number of dates in support of Eric Clapton. Further tours in 2011 and 2012 followed, with the band performing a complete version of Tommy.
In February 2012, he began his own tour of the UK, in support of his new album which has been credited as his most impactful solo recording to date "Looking Out Looking In", which London's Daily Express rated 5/5, calling it "utterly compelling" and naming Simon Townshend "a genuinely original talent."
His live band for this contained Tony Lowe (guitar), Phil Spalding (bass), and Greg Pringle (drums), His live shows have been variously described as "supercharged" (New York Times), "irresistible" (Washington Post) and a "catharsis" (Los Angeles Times). Billboard labelled him "impressive" and Goldmine affirmed, "truly enjoyable listening."  In short, as London's Gig Guide said, "you would be a fool to miss him."
In the late summer and fall of 2012, he played with The Who on the Quadrophenia and More tour, which included a performance at the 2012 Summer Olympics closing ceremony.
In July 2014 at Milton Keynes Bowl he again joined Pearl Jam on stage to perform his song I'm the answer.
From 2014 to 2016, Townshend joined The Who on their 50th anniversary tour, The Who Hits 50!. In 2018, he toured with Roger Daltrey, performing Tommy with local orchestras in the United States.
Simon Townshend