* Conference Director - VII Multicore World 7-8-9Feb2018, Wellington, New Zealand

* Keynote - 10th LatinAmerican HPC Conference, 20-22Sept2017, Buenos Aires, Argentina

* Co-Chair IoT-HPC & SKA-BigData BoF sessions ISC17 18-22June2017, Frankfurt, Germany

*Speaker - MVD FinTechForum, 7-8June2017, Montevideo, Uruguay

* Speaker, 4th Computing for SKA 9-10Feb2017, Auckland, NZ

* Speaker, ITNAC 2016, Dunedin, NZ

* "Is your IT project a Black Swan?" -ITx 2016, Wellington, NZ.

* Speaker, "Migrating to Exascale Worldwide" - Workshop on International Cooperation - ISC16, Frankfurt, Germany

* Invited Plenary Speaker - CHPC 2015, Pretoria, South Africa.

* "Towards an Open Software Stack for Exascale Computing". Convenor & Panel Moderator at SC15, Austin, Texas, US

* Speaker, "SKA in Seoul" - Asia Pacific Regional Workshop on HI Science - 2015, Korea