McNeil Lamswood competed in five
Canadian Junior Curling Championships in his junior career in 2015, 2016, 2018, 2019 and 2020. His best result came
in 2020 playing third for
Daniel Bruce with
Joel Krats at second and
Nathan King at lead. The team finished the round robin and championship pool with an 8–2 record, which qualified them for the playoffs. They defeated
Rylan Kleiter of Saskatchewan in the semifinal before coming up short to
Jacques Gauthier's Manitoba rink in the final. It was the first time since 2011 that Newfoundland and Labrador qualified for the playoffs. Also in his junior career, McNeil Lamswood won a silver medal at the 2019
U Sports/Curling Canada University Curling Championships as second for
Greg Blyde and skipped the Newfoundland and Labrador team to a fourth-place finish at the
2018 Canadian U18 Curling Championships. In 2020, McNeil Lamswood spared on the
Brad Gushue team at the 2020
Stu Sells 1824 Halifax Classic as
Geoff Walker was unable to attend due to the
COVID-19 pandemic in Canada. The team made it all the way to the final where they defeated
Matthew Manuel to win the event. Also during the
2020–21 season, McNeil Lamswood skipped his own team in the
2021 Newfoundland and Labrador Tankard. After going 6–1 in the round robin, they came up short to
Colin Thomas in the semifinal. In 2021, McNeil Lamswood picked up
Aaron Feltham to play in the lead position for the quartet. They beat Team
Nathan Young to become the team to represent the Memorial University Seahawks at the
2022 Atlantic University Sport Curling Championships. They ended up placing runner-up to the Dalhousie Tigers team. In the
2022 Newfoundland and Labrador Tankard the team failed to qualify for the play-offs; finishing with a 3-5 record. McNeil Lamswood, Bruce, and Feltham joined forces with
Ty Dilello for the
2024-25 curling season, where they found immediate success, representing Newfoundland and Labrador at the
2025 Montana's Brier, after winning the team's first
2025 Newfoundland and Labrador Tankard title over
Andrew Symonds. ==Personal life==