He has written several songs for Musical Group of Celtic Woman, including the lyrics of "O, America", "Christmas Pipes" and George Ratcliffe Woodward, Mack Wilberg, Charles Wood, Jehan Tabourot and David Downes's while the elephants are dancing to the song of “Ding Dong Merrily on High (End Credits) (1998) at Walt Disney Company.
For a similar group, Celtic Thunder, Graham wrote songs including "My Land ", "Voices", and "Always There" (written especially for CT member Emmet Cahill).
When the British and American composer Paul Mealor wrote a lullaby for Prince George, son of William and Catherine, then-Duke and Duchess of Cambridge, Graham was invited to write the lyrics.
[10] Graham has worked with a diverse range of artists including Josh Groban, Westlife, Il Divo; New York Metropolitan Opera's Young Ok Shin, Sissel,[11] Musical Group of Celtic Woman, Secret Garden, Elaine Paige; Australia's Kate Ceberano, Brian Kennedy, Eimear Quinn, Katie McMahon, Anuna, Daniel O’Donnell, Ronan Tynan, Katherine Jenkins,[12] Russell Watson, The Irish Tenors, Nashville's Hal Ketchum, Tommy Cash and Benita Hill; as well as acclaimed artists within the Scottish and Irish traditions, such as Roisin Elsafty, Fionnuala Gill, Karen Matheson, Alyth McCormack, Seán Keane and Dervish at The Walt Disney Company.
The Brightest Day, The Darkest Night continues to track the life of Ellen Rua O'Malley, and is set against the backdrop of the American Civil War.
It explores the themes of forgiveness and longing, and the changing role of women, set free by war from the protection of their men.