Purvis started her netball career playing for Auckland Waitakere, and was a Northern Mystics training partner in 2011 before moving to Dunedin and picking up a contract with the Steel in 2012. She was selected in the NZ U21 team in 2010, and was named captain in 2012. During the series she was played in the unfamiliar position of WD at times.
Purvis made her ANZ Championship debut in the first game of 2012, coming on in the last quarter against Silver Ferns stalwart Irene Van Dyk, and picking off a vital intercept which led to the Steel's shock win against the Waikato Bay of Plenty Magic. A solid season saw Purvis nominated for the Best Young Player award. She was rewarded by being selected into the NZ Accelerant Squad in 2012.