# Siena Grima Sydney apprentice jockey > Live situation record from CLSTR: https://clstr.news/situations/siena-grima-sydney-apprentice-jockey > Updated: 2026-07-30T01:51:44.000Z. Sources: 5. Developments: 2. In early July, Siena Grima secured the Sydney apprentice jockey premiership with a win on Perfect Justice. By the end of the month, she had finished the season with 34 victories, four ahead of the defending champion, and set her sights on becoming the first woman to win consecutive apprentice premierships, remaining an apprentice until January 2028 under the guidance of trainer Chris Waller and mentor Darren Beadman. ## Claims - Siena Grima finished the season with 34 winners, four ahead of defending champion Braith Nock. (corroborated by 3 sources) - Grima aims to become the first woman to win back-to-back Sydney apprentice jockey premierships. (corroborated by 3 sources) - Siena Grima is 23 years old. (corroborated by 3 sources) - Grima holds a two‑kilogram claim and her apprenticeship ends in January 2028. (corroborated by 3 sources) - She is backed by trainer Chris Waller and mentor Darren Beadman since December. (corroborated by 3 sources) - Grima joins female jockeys Kathy O’Hara, Winona Costin and Rachel King as junior premiership winners. (corroborated by 3 sources) - She has not missed any work days during her apprenticeship. (corroborated by 3 sources) - She rode Althoff to victory at Royal Randwick in January. (corroborated by 3 sources) ## Timeline ### 2026-07-30: Siena Grima targets historic back-to-back Sydney apprentice jockey crown Siena Grima, 23, won the Sydney apprentice jockey junior premiership with 34 wins and aims for a historic back‑to‑back title, backed by Chris Waller and Darren Beadman. 5 sources. https://clstr.news/cluster/siena-grima-targets-historic-back-to-back-sydney-apprentice-jockey-crown ### 2026-07-11: Siena Grima tops Sydney apprentices premiership after Perfect Justice win Siena Grima leads the Sydney apprentices premiership after riding Perfect Justice to a Midway Handicap win, marking her 31st metropolitan victory. 2 sources. https://clstr.news/cluster/siena-grima-tops-sydney-apprentices-premiership-after-perfect-justice-win --- Cite as: Siena Grima Sydney apprentice jockey. CLSTR, https://clstr.news/situations/siena-grima-sydney-apprentice-jockey