"[3] At the age of eighteen, Kiske was asked to join the German power metal band Helloween, which was fronted by singer/guitarist Kai Hansen.

[5] The Keeper of the Seven Keys albums proved to be highly influential and aided in the formation of a new wave of European power metal bands, such as Blind Guardian,[6] Stratovarius,[7] HammerFall[8] and Edguy.

[9] The album's worldwide success enabled the band to embark on an extensive world tour and perform at famous festivals such as Monsters of Rock.

"[4] The Pumpkins United World Tour started in October 2017 in South America and continued in Europe with concerts lasting close to three hours.

[19] The band embarked on a Brazilian tour in September 2019, which started at Rockfest (São Paulo) and ended with their performance at the Rock In Rio Festival.

[22] The album featured guest appearances by Adrian Smith of Iron Maiden, Kai Hansen and Ciriaco Taraxes and contained songs in a wide variety of styles.

I was frustrated and disappointed, and didn't want to have anything to do with it...it started with Toby [Tobias Sammet] talking me into laying vocals down on some of his songs that sounded very Helloween-like.

"[37] He had a main role in the concept of the Metal Opera albums and performed on the songs "Reach Out for the Light", "Breaking Away", "Farewell", "Avantasia", "The Tower", "The Seven Angels" and "No Return".

[41] During 2010, Kiske performed on the Avantasia albums The Wicked Symphony and Angel of Babylon, singing on the tracks "Wastelands", "Runaway Train" and "Stargazers".

[42][43] Between November and December, he also took part in "The Metal Opera Comes to Town Tour", sharing the stage with Tobias Sammet, Kai Hansen, Jørn Lande, Bob Catley, Amanda Somerville, Sascha Paeth, and Oliver Hartmann among others.

[45] During 2013, Kiske took part in the Avantasia album The Mystery of Time, singing on the songs "Where Clock Hands Freeze", "Savior in the Clockwork" and "Dweller in a Dream".

Between April and August, he also participated on "The Mystery World Tour", which included 10 European festival appearances and 3-hour long shows in South America, Japan, Russia and Europe.

[52] In 2022, Kiske participated in the Avantasia album A Paranormal Evening with the Moonflower Society, singing on the songs "The Inmost Light" and "Arabesque".

The project's debut album, Place Vendome, was a blend of melodic hard rock and AOR (comparable to the sound of bands such as Foreigner or Journey) and the majority of the songwriting was provided by Dennis Ward.

The songwriting for the second album was provided by musicians Magnus Karlsson (Primal Fear), Torsti Spoof (Leverage), Ronny Milianowicz (Saint Deamon) and Robert Sall (Work of Art).

[60] The songwriters for this release were Alessandro Del Vecchio (Hardline), Timo Tolkki (ex-Stratovarius), Brett Jones, Tommy Denander (Radioactive), Magnus Karlsson (Primal Fear), Sören Kronqvist (Sunstorm), Roberto Tiranti and Andrea Cantarelli (Labyrinth).

The album featured songs written by Magnus Karlsson, Alessandro Del Vecchio, Jani Liimatainen (Cain's Offering, ex-Sonata Arctica), Olaf Thorsen (Vision Divine, Labyrinth), Fabio Lione (Vision Divine, Angra, ex-Rhapsody of Fire), Simone Mularoni (DGM), Aldo Lonobile (Secret Sphere) and Mike Palace.

In addition, it was the first Place Vendome album to feature guest guitar solos by Gus G (Firewind, Ozzy Osbourne), Kai Hansen (ex-Helloween, Gamma Ray, Unisonic), Mandy Meyer (Krokus, ex-Asia, Unisonic), Alfred Koffler (Pink Cream 69), Michael Klein, Magnus Karlsson and Simone Mularoni.

The project was named Kiske/Somerville and it marked the contribution of musicians Mat Sinner, Magnus Karlsson, Sander Gommans, Martin Schmidt and Jimmy Kresic.

[68] In March 2011, Kai Hansen joined the band,[69][70] and on 15 October the new line-up performed its first show at Loud Park Festival (Japan).

We did two festivals in 2010, and we started to write songs and stuff…We wrote a lot of stuff, but somehow it needed this extra creative force of Kai Hansen to complete the thing, which happened c. 2010.

[1] During 2002, Michael sang the song "Key to the Universe", which was featured on Timo Tolkki's (guitarist of the band Stratovarius) solo album Hymn to Life.

[1] In 2003, Kiske took part in the metal opera Days of Rising Doom by Aina, in the role of the Narrator, singing on the songs "Revelations", "Silver Maiden", "Serendipity" and "Restoration".

The band's debut album, New Era, was recorded by session musicians and Kiske on the role of the main singer, performing vocals for the tracks "I Did It My Way", "Angel", "Keep The Flame Alive", "Last Night on Earth" and "Revolution Renaissance".

[101] During December, he participated in the "Christmas Metal Symphony 2013 tour", sharing the stage with Joey Belladonna, Udo Dirkschneider, Chuck Billy, Joacim Cans, Floor Jansen and a symphonic orchestra.

[107] In 2016, he participated as a guest vocalist on the Hansen & Friends XXX : 30 Years of Metal album and on the project's performance at Wacken Open Air Festival.

[110] During 2018, Kiske sang on the duets "Angel Of Light" and "King Thorgan's Hymn", featured on the album Legend of Valley Doom part 2 by Marius Danielsen.

The song was a tribute to Ronnie James Dio and featured guest appearances by former Rainbow members Tony Carey, Bob Daisley and Bobby Rondinelli.

[112] His influences include Elvis Presley, John Farnham, Bruce Dickinson, Geoff Tate, Rob Halford and Ronnie James Dio.

Some fans and critics have likened his singing style and range to that of Geoff Tate or a young Samson-era Bruce Dickinson, with shades of Rob Halford.