This is the sixth edition of the successful South Pacific Conferences in Mathematics in 2005, 2010 (http://pages.univ-nc.nc/~bonnel/spcm-2010/confspcm10.htm) and 2016 (https://spwo.sciencesconf.org) held in Noumea, New Caledonia, and South Pacific Optimization Meetings in 2013 (https://carma.newcastle.edu.au/meetings/spom/) and 2015 (https://carma.newcastle.edu.au/meetings/spcom/), held in Newcastle and Adelaide, respectively. The (Sixth) South Pacific Optimization Meeting (SPOM 2017) is hosted by Curtin University, Perth, Western Australia, between 8 and 10 December 2017. SPOM 2017 will take place immediately after two other optimization meetings, the Eighth Australia-China Workshop on Optimization and the Second Pacific Optimization Conference, also organised by Curtin University, between 4 and 7 December 2016. It will precede the 61st Annual Meeting of the Australian Mathematical Society which will be held between 12 and 15 December 2017 in Macquarie University, Sydney.