Gualtieri reached the semifinal of the SIBA national singles in 2013, losing to eventual champion Thomas Mann of West Lothian IBC.

[11][12][13][14][15] In 2024, alongside brother Ryan Gualtieri, he won a silver medal at the British Isles Bowls Championships in the pairs, losing 14-15 in the final to England's Nick Wardle & Joe Dawson at Leamington Spa.

In the triples, Gualtieri alongside Blair Davidson and Dean Riva won their group undefeated, eventually winning a silver medal after losing to England 10-17 in the final.

[18][19][20] In the fours, Gualtieri alongside Blair Davidson, Darren Weir and Dean Riva won their group undefeated, eventually winning a silver medal after losing to Ireland 12-13 in the final.

[21][22] In November 2024 Gualtieri represented Scotland at the prestigious Hong Kong International Bowls Classic, winning the pairs event with Iain McLean after beating England in the final.