Zielke first played football in 2008 at the age of 19. She played with local team, Morningside. She was selected to participate in the women's AFL high-performance camp in 2010. As part of the program she played in a curtain-raiser exhibition match ahead of the round 12, 2010 AFL match between and. After the team at Morningside folded, Zielke approached the Coorparoo Football Club about establishing a women's team in 2013, to play in the AFL Queensland Women's League. She was the club's inaugural captain. In 2013, a broken arm forced Zielke to miss a considerable period of football, including a chance to play in the first women's AFL exhibition match. She returned to football late in the season and captained Coorparoo to a state-league premiership. She kicked a goal after the siren to win the game. In 2014 and 2015, she captained her second and third consecutive QAWFL premierships, while also being awarded the league's best and fairest in both years. Zielke moved again in 2016, this time to the University of Queensland side competing again in the QAWFL. She was named in the leagues team of the year at the conclusion of the season. In 2014, Zielke was drafted by ahead of the years women's AFL exhibition match. She was not retained after that year's match and would subsequently re-nominate for the draft in 2015. She was selected again, this time by the. She later played in and captained the Brisbane Lion's representative side in the 2016 exhibition series. Zielke has captained Queensland at three AFL Women's National Championships.
AFL Women's career
Zielke was signed as a priority access player by in August 2016, ahead of the inaugural AFL Women's season in 2017. She completed a reduced pre-season ahead of 2017, after breaking her foot in September 2016. Zielke was named the club's inaugural AFL Women's captain in January 2017. Zielke was highlighted as "Player of the Week" for her round 3 performance in the 2017 AFL Women's season. It was the second round in a row that a Brisbane Lions player received this honor from the AFL Players Association. At the end of the season, Zielke was nominated by her teammates for the AFLW Players’ Most Valuable Player Award, and was also listed in the 2017 40-player All-Australian squad. On 17 May 2017, Brisbane announced they has signed Zielke for the 2018 season.
Personal life
Off-field, Zielke works as an admin support officer at the Brisbane Lions. She also has worked as an assistant coach of the Queensland under 18 youth girls team.
