The RASNZ Occultation Section has promoted a series of symposia on occultation science alternately between Australia and New Zealand annually since 2007. Continuing in this tradition, the Occultation Section is promoting the 10th Trans-Tasman Symposium on Occultations - TTSO10 - in conjunction with NACAA 2016 in Sydney. With a programme including part of the main NACAA schedule, the symposium will include presentations by Australian and international speakers on occultation science, observation results, developing techniques for occultation observation, and the sharing of experiences and learnings. There will be opportunity for informal networking and impromptu help and training.