Grice was born in 1969 in Newcastle, but grew up in Wollongong where he completed high school.
He trained as a lawyer at the University of New South Wales, graduating with degrees in Commerce (Marketing) and Law in 1993.
[4] During his time as vicar, in 2006 Grice was appointed to the Diocesan Council and in 2012 was collated as Archdeacon of the Macintyre.
[3] In 2014, Grice was approached by Gary Nelson, Bishop of North West Australia and offered the position of Dean of Holy Cross Cathedral in Geraldton, which he accepted.
On 21 July 2020, Grice was appointed as the 13th Bishop of Rockhampton, succeeding David Robinson who had retired earlier in 2020.