Demmans spent the majority of her early career playing with
Robyn Silvernagle. In 2010, the pair won their first women's tour event at the Cornerstone Credit Union Ladies Cash Bonspiel. That same year, they played in their first
Saskatchewan Scotties Tournament of Hearts, finishing fifth in their pool with a 2–3 record. Two years later, they finished 3–2 in their pool, however, missed out on the playoffs due to a head-to-head tiebreaker loss. In 2013, Demmans began playing for the
Jessie Kaufman rink out of Alberta. With third
Tiffany Steuber and lead
Stephanie Enright, the team won the inaugural
Avonair Cash Spiel and finished runner-up at the
Boundary Ford Curling Classic and the
Shamrock Shotgun. They also played in the
2013 Curlers Corner Autumn Gold Curling Classic, which at the time was a
Grand Slam of Curling event. Despite their success throughout the season, the team had mixed results at the
2014 Alberta Scotties Tournament of Hearts, ultimately missing the playoffs with a 4–3 record. The following season, Demmans returned to Saskatchewan where she played for
Jolene Campbell. This arrangement only lasted one season with the team failing to qualify for the provincial championship. Demmans then rejoined Silvernagle at third with new front-enders
Cristina Goertzen and
Kara Kilden. In their first season together, the team had a strong run at the
2016 Saskatchewan Scotties Tournament of Hearts, finishing first in their pool to earn a spot in the 1 vs. 2 game. They then lost to
Stefanie Lawton before dropping the semifinal to Jolene Campbell, ending their run. The following year, the team again had an impressive showing at the provincial championship, taking the top seed through the round robin with a 7–1 record. They then defeated Lawton in the 1 vs. 2 game to advance to the final where they were defeated 10–7 by
Penny Barker. For the
2017–18 season, the team brought on Jolene Campbell as their new third, shifting Demmans to second. On tour, they won the Boundary Ford Curling Classic and reached the playoffs at the
2017 GSOC Tour Challenge Tier 2 and the
2017 Colonial Square Ladies Classic. Heading into the
2018 Saskatchewan Scotties Tournament of Hearts as one of the favorites, the team again topped the round robin with a 7–1 record and then beat
Chantelle Eberle in the 1 vs. 2 game. Facing
Sherry Anderson in the championship game, Team Silvernagle fell 7–6 in an extra end, losing their second straight provincial championship final. After the season, the team disbanded, with Demmans and Campbell joining the newly formed
Kristen Streifel rink for the
2018–19 season. Playing a limited schedule, Team Streifel reached the playoffs in every event they played in their first season together, notably making the semifinals of the
2018 Tour Challenge Tier 2. In the new year, Demmans herself would miss the
2019 Saskatchewan Scotties Tournament of Hearts due to maternity leave. With spare
Callan Hamon, her team finished in third place after a semifinal loss to
Sherry Anderson. Back together the following season, the team was unable to maintain their consistency from the year before, ultimately failing to qualify in every tour event and finishing 2–3 in the newly formatted triple knockout of the
provincial championship. After Team Streifel broke up following the season, Demmans joined the newly formed Robyn Silvernagle rink alongside Kristen Streifel, Jessie Hunkin and
Becca Hebert. Due to the
COVID-19 pandemic in Canada, the qualification process for the
2021 Canadian Olympic Curling Trials had to be modified to qualify enough teams for the championship. In these modifications,
Curling Canada created the
2021 Canadian Curling Pre-Trials Direct-Entry Event, an event where eight teams would compete to try to earn one of two spots into the
2021 Canadian Olympic Curling Pre-Trials. Team Silvernagle qualified for the Pre-Trials Direct-Entry Event as the third seed. The team qualified for the playoffs through the B Event, giving them two chances to secure a spot in the Pre-Trials. They then, however, lost 10–8 to
Kerry Galusha and 8–6 to
Jill Brothers, finishing third and not advancing. On tour, the team qualified for three straight quarterfinals at the
Boundary Ford Curling Classic, the SaskTour Women's Moose Jaw event and the
Red Deer Curling Classic. In December 2021, they won the Swift Current Women's Spiel, defeating
Michelle Englot 8–3 in the championship game. In the new year, Team Silvernagle competed in the
2022 Saskatchewan Scotties Tournament of Hearts where they entered as the third seeds. They qualified for the playoffs through the C Event before being eliminated by
Amber Holland in the 3 vs. 4 page playoff game. After this, Robyn Silvernagle left the team and Jessie Hunkin took over skipping duties with the team now playing out of Alberta. In their third event, Team Hunkin reached the semifinals of the
Prestige Hotels & Resorts Curling Classic, losing to
Ikue Kitazawa. They then played in the
2022 Tour Challenge Tier 2 where after dropping their opening game, they ran the table to reach the final. There, they were defeated 8–2 by
Clancy Grandy. After two more quarterfinal appearances, the team played in the
2023 Alberta Scotties Tournament of Hearts where they finished in fifth place with a 3–4 record. Third Kristen Streifel then left the team and was replaced by
Jessie Haughian. To begin the
2023–24 season, the team had three consecutive quarterfinal appearances. Their best finish came at the Saville Grand Prix with a semifinal loss to
Selena Sturmay. At the
2024 Alberta Scotties Tournament of Hearts, the team bettered their performance with a 4–3 record but did not qualify for the playoffs based on their draw-to-the-button total. After two seasons in Alberta, Demmans returned to Saskatchewan to play for Jolene Campbell. With
Rachel Erickson and
Abby Ackland, the team began at the
2024 PointsBet Invitational which they qualified for through CTRS points. In the opening round, they lost 8–5 to
Kate Cameron. On tour, they only reached the playoffs once at the Martensville International where they made the semifinals. They also played in the
2024 Tour Challenge Tier 2, however, finished 1–3. Although they struggled throughout the tour season, Team Campbell turned things around at the
2025 Viterra Prairie Pinnacle, going 7–1 through the round robin and earning a spot in the 1 vs. 2 game where they beat
Nancy Martin. Facing Martin again in the final, the team was unable to overcome an early four-point deficit, losing 8–7 and finishing second. Ackland then left the rink and was replaced by Robyn Silvernagle for the
2025–26 season. On tour, the team made one final in Moose Jaw and qualified in four other events. At
provincials, they finished second through the round robin with a 6–2 record but then knocked off the previously undefeated
Ashley Thevenot 10–7 to qualify for the championship game. There, after losing the final in 2017, 2018 and 2025, Demmans won her first provincial championship as the team beat Jana Tisdale 4–3. ==Personal life==