His musical interests range from medieval to contemporary music and include singing, conducting, and writing. In 1990, after many years as Music Director of the Hilliard Ensemble, he founded the Theatre of Voices and began his series of acclaimed recordings for harmonia mundi usa. From 1996 to 2003, Hillier was Director
of the Early Music Institute at Indiana University, Bloomington. In September, 2001 he was named Artistic Director and Principal Conductor of the Estonian Philharmonic Chamber Choir, with which he launched
a cycle of recordings exploring the choral tradition of the Baltic Sea countries. Baltic Voices 1 and Baltic Voices 2 met with unanimous praise and each won Hillier a Grammy® nomination.The Powers of Heaven, a much-admired pro- gram of Russian Orthodox sacred music, was followed by Rachmaninov’s All-Night Vigil, Op. 37 and, most recently, by Baltic Voices 3. In 2004 Paul Hillier was awarded the Estonian Cultural Prize.
In 2002 he was made Honorary Professor in Music
at the University of Copenhagen, and in 2003 accepted the post of Chief Conductor of Vocal Group Ars Nova (Copenhagen). Hillier is the author of a monograph “Arvo Pa?rt” (1997) and editor of “The Collected Writings of Steve Reich” (2002), both published by Oxford University Press. His latest project is a book about consort singing.