Juniors Schwarz-van Berkel began his international career representing Switzerland at the
2010 World Junior Curling Championships, as the fourth rock thrower on a team skipped by
Peter de Cruz. At Schwarz-van Berkel's first international event, the team went 7–2 in the round robin, and would go on to win the championship, beating Scotland's
Ally Fraser 7–6 in the final. Schwarz-van Berkel would return to the
2011 World Junior Curling Championships with de Cruz, where the team would fail to defend their title, losing 6–5 to Sweden's
Oskar Eriksson in the final. Schwarz-van Berkel would make his final World Junior appearance as an alternate for the
Dominik Märki rink in
2012, where the team would finish 5–4, finishing 6th and failing to qualify for the playoffs.
Men's Alternate for Team Michel (2011–2014) Schwarz-van Berkel would make his international men's debut at the
2011 European Curling Championships as the alternate for
Sven Michel's rink. At the European's, the Swiss team finished 6th with a 5–4 record. Schwarz-van Berkel would again be the alternate for Michel's rink at the
2013 European Curling Championship, where he would win his first European Championship, winning against Norway's
Thomas Ulsrud 8–6 in the final. As the alternate for the Michel rink, he would represent Switzerland at the
2014 Winter Olympics, where the team went 3–6 in the round robin, finishing 8th.
Team de Cruz (2014–2022) Schwarz-van Berkel would join the
Peter de Cruz rink as their fourth rock thrower starting in 2014, curling alongside
Dominik Märki and
Valentin Tanner. They would represent Switzerland at the
2014 World Men's Curling Championship, where the team finished 3rd, beating Canada's
Kevin Koe 7–5 in the bronze medal game. After one year together, Märki and de Cruz rink would split, and
Claudio Pätz would replace Mäki at third. The de Cruz rink would represent Switzerland at the
2015 European Curling Championships, where the team would finish second, losing to Sweden's
Niklas Edin 7–6 in the final. de Cruz would be unable to defend their
Swiss Men's National Championship title in 2015, losing to eventual champions
Marc Pfister in the semifinals. Team de Cruz would be chosen by Swiss Curling to represent Switzerland at the
2016 European Curling Championship, where they would win bronze, beating Russia's
Alexey Timofeev 8–6 in the bronze medal game. de Cruz would finally win the 2017 Switzerland Men's Curling Championship against
Felix Attinger, qualifying them to represent Switzerland at the
2017 World Men's Curling Championship. At the 2017 World Championships, de Cruz would go 8–3 in round robin play, and win a bronze medal, beating
John Shuster from the United States 7–5 in the bronze medal game. de Cruz would again be chosen to represent Switzerland at the
2017 European Curling Championships on home soil in
St. Gallen. de Cruz would again win bronze at the Europeans, this time beating Norway's Ulsrud 6–5 in the bronze medal game. de Cruz would also win their first
Grand Slam of Curling title, winning the
2018 Meridian Canadian Open 4–3 against Edin in the final. Shortly after winning their first Grand Slam, de Cruz would also represent Switzerland at the
2018 Winter Olympics. At the 2018 Olympics, the de Cruz team had a strong showing, where they won an Olympic bronze medal, beating Canada's Koe 7–5 in the bronze medal game. At the beginning of the
2018–19 season, Pätz and the de Cruz rink announced they would be parting ways, with long-time national rival
Sven Michel joining the team and throwing third rocks. At the
2018 European Curling Championships, the new de Cruz team would finish 6th, completing the round robin with a 5–4 record. The new de Cruz team would also go on to beat
Yannick Schwaller in the final of the 2019 Swiss Men's Curling Championship, qualifying de Cruz to represent Switzerland at the
2019 World Men's Curling Championship. At the 2019 World Championship, they had a strong showing, winning bronze after beating Japan's
Yuta Matsumura 8–4 in the bronze medal game. After the World Championships were cancelled in 2020 due to the
COVID-19 pandemic, the de Cruz rink would return to represent Switzerland at the
2021 World Men's Curling Championship, once again winning a bronze medal, beating
RCF's
Sergey Glukhov 6–5 in the bronze medal game. Team de Cruz would compete at the
2021 European Curling Championships, where they would finish 5th, finishing round robin play with a 5–4 record. de Cruz would also win the
2021 Swiss Olympic curling trials and represent Switzerland at the
2022 Winter Olympics, Schwarz-van Berkel's third Olympics. At the 2022 Olympics, the Swiss would finish in 7th place with a 4–5 record.
Team Schwaller (2022–present) In April 2022, it was announced that Schwarz-van Berkel and Michel would be joining a new team skipped by
Yannick Schwaller and
Pablo Lachat for the
2022–23 season. Schwaller would skip the team but throw third rocks with Schwarz-van Berkel throwing fourth rocks, Michel playing second, and Lachat at lead. The new Schwaller rink would represent Switzerland at the
2022 European Curling Championships, where they would go 8–1 in the round robin, but lose to Scotland's
Bruce Mouat 5–4 in the final, winning the silver medal. Schwaller would go on to represent Switzerland at the
2023 World Men's Curling Championship, where they would win a bronze medal, beating Italy's
Joël Retornaz 11–3 in the bronze medal game. Schwaller would again represent Switzerland at the
2023 European Curling Championships, once again winning a bronze medal over Italy's Retornaz, this time by a score of 8–4 in the bronze medal game. At the
2024 World Men's Curling Championship, the Swiss team would finish a disappointing 7th, going 6–6 in round robin play. However, Schwaller would have a strong season on the
Grand Slam of Curling tour, finishing in the semifinals of both the
2023 National and
2023 Masters. Schwaller would again have a strong start to the
2024–25 curling season. At the Grand Slam events, Schwaller would finish in the quarterfinals of the
2024 Tour Challenge and semifinalists at the
2024 Canadian Open. At the
2024 European Curling Championships, the team would finish 4th, losing to Norway's
Magnus Ramsfjell in the bronze medal game. The Schwaller rink would return to the
2025 World Men's Curling Championship, where they would go 9–3 in the round robin, but lose in the final to Scotland's Mouat 5–4, finishing in second and winning the silver medal. ==Personal life==