In September 2005, Pearce, refereed his first game, Crediton Seconds against Newton Abbot Thirds.

[5] On 10 September 2011, Pearce took charge of his first Premiership match, officiating Gloucester's home game against Worcester Warriors.

In February 2013, Pearce refereed his first international, taking charge of Romania against Russia in the European Nations Cup.

[7] In 2014, Luke made his first Six Nations Championship appearance, acting as Assistant Referee for Steve Walsh in the meeting between Italy and Scotland.

In June 2017, he refereed his first Tier 1 nation, officiating Argentina's home match against Georgia.