[3] Franglen has worked with Michael Jackson, Celine Dion, Whitney Houston, Madonna, Barbra Streisand, Quincy Jones, David Foster, Toni Braxton, The Corrs, Monica, Bee Gees, Luciano Pavarotti.
[6] These include: "Un-Break My Heart" (Toni Braxton) "Change The World" (Eric Clapton) "For You I Will" (Monica) "I Swear" (All 4 One) "I Have Nothing" (Whitney Houston) "No Matter What" (Boyzone) and his remix of E.Y.C.
[8] He has produced a wide variety of material, from UK grime rappers such as Ironik and Chip to classical tenors including Rolando Villazon.
[9] Franglen moved into film music when he was introduced to the composer John Barry late in the production of the score for Dances with Wolves and collaborated on the soundtrack album.
Other long-term collaborations were with the film composers Alan Silvestri, James Horner, and Howard Shore, for whom he created the trademark dystopian electronica for Seven by David Fincher.
He reconnected with Horner for Avatar, spending almost 11 months working on the score; he acted as Electronic Music Arranger and also co-wrote and co-produced the Golden Globe and Grammy nominated theme song.
[15][16] In 2018, he composed the scores to Peppermint directed by Pierre Morel, the MGM TV series The Truth About the Harry Quebert Affair by director Jean-Jacques Annaud.
In 2019, he premiered a new large scale orchestral and choral work for live performance, the oratorio "The Birth of Skies and Earth", based on the great Chinese creation myths.
A ninety-minute work, with libretto in Mandarin Chinese, it premiered in Shanghai, with 176 musicians on stage, featuring a 90 piece orchestra, 80 voice choir, and six soloist singers.