10 June 2008: Emacs

at the Perth Linux Users' Group

03 Mar 2009: OpenVPN

at the Perth Linux Users' Group

05 Oct 2010: encryption (mainly covering public key cryptography)

at the WA chapter meeting of SAGE-AU (The System Administrators Guild of Australia)

08 Jan 2013: C++ on Linux

at the Perth Linux Users' Group

09 Jul 2013: Introduction to Subversion

at the Perth Linux Users' Group

01 Jul 2014: Postfix overview and advanced features

at the WA chapter meeting of SAGE-AU (The System Administrators Guild of Australia)

17 Nov 2015: Code Deployment with Mina

at the Amazon Web Services User Group

3 May 2016: SSH certificates

at the WA chapter meeting of SAGE-AU (The System Administrators Guild of Australia)

2 Aug 2016: Webmin and Virtualmin

at the WA chapter meeting of SAGE-AU (The System Administrators Guild of Australia)

1 Sep 2016: Python modules

at the Django and Python meetup
Also covers lessons learned from developing Shepherd
(See the Github repo for the talk)

16 May 2017: OpenVPN mesh networking

at the Amazon Web Services User Group
(See the Github repo for the talk)

4 July 2017: VPNs with IPsec

at the WA chapter meeting of the Information Technology Professionals Association
(See the Github repo for the talk)

30 Aug 2017: Introduction to Ansible

at the DevOps Perth Meetup
(See the Github repo for the talk)

28 Feb 2018: Taming SELinux with Ansible

at the DevOps Perth Meetup
(See the Github repo for the talk)

30 Mar 2018: Multi-factor authentication

(Part of a panel on Online safety, Facebook, cyber-security and identity theft)
at Swancon