Available to hire
I’m David Letcher, a Senior Technical Specialist with extensive experience across finance, defence, and communications. I specialize in system migration, deployment automation, and infrastructure modernization, and I’m passionate about turning complex challenges into reliable, scalable solutions.
I’ve led Linux-based migrations, cloud deployments, and monitoring implementations, built automation with Ansible, Jenkins, Docker, AWS, and VMware, and I enjoy mentoring technical teams to achieve high-performance results.
Work Experience
Senior Technical Specialist (Part Time) at Letcher.Tech
September 1, 2022 - PresentAnalyse and maintain Linux-based backend PHP/Laravel booking system with MySQL. Built several Linux systems for Apache-based DEV environment and AWS Linux-based EC2/S3 UAT system. Generate weekly DB exports for fallback. Upgrade infrastructure (PHP and Laravel versions). Add new functionality per client requirements.
Senior Technical Specialist (Part Time) at Midnight IT
August 1, 2024 - PresentAnalyse CFMEU Membership system and create test cases for new Transform system. Raise and resolve Jira tickets. Liaise with external development and technical staff.
Senior Technical Specialist at EMS Brüel & Kjær
July 1, 2019 - July 1, 2024Migrated FreeBSD to Debian Linux: upgraded Apache v1 and Perl applications to latest versions on new OS. Updated Perl and JavaScript applications with Auth0 integration. Implemented Ansible-based deployment of WebTrak to all production and test environments. Configured DataDog monitoring for server health. Deployed AWS EC2, Route 53, and ELB via CodeDeploy and Ansible. Converted Bitbucket repositories to GitHub. Implemented WSL2 instances on PCs for Linux access. Fixed legacy Y2K bug and identified/resolved deadlock issues in major product.
Senior Technical Specialist (Contract) at SecurePay
March 1, 2019 - July 1, 2019Implemented migration of HEAT-based CMDB into Jira Insight using PERL scripts, JSON, and YAML. Integrated Linux VMs from VMWare datacenters and AWS Linux VMs (via Paws PERL package) with ESX and puppet facts. System linked to Jira SW/HW tickets. All code stored in Bitbucket via git. Utilized Slack for internal communication.
Infrastructure Specialist (Contract) at Synaptron
November 1, 2018 - March 1, 2019Supported RPA (Robotic Process Automation) for Telstra Siebel order capture and processing system. Upgraded and expanded Ansible auto-deployment module using make and YAML to upgrade RPA packages on Linux VMWare VMs. Created POC for Docker container implementation of RPA code into Linux VMs.
Product Specialist (Contract) at InfoMedix
July 1, 2018 - November 1, 2018Deployment and Migration Technical Lead: Updated Linux-based deployment process documentation in Wiki and SharePoint. Created Linux deployment scripts. Handled 4 simultaneous client upgrade projects via Agile tracking in Jira (Epics and tasks). Utilized Jasper tools for reporting templates. Implemented 2-factor authentication protocols for client site connections.
Senior Technical Consultant at National Australia Bank
September 1, 2017 - May 1, 2018Enterprise HP Performance Center, HP ALM, IBM InfoSphere: Discovered and remediated long-standing bug in HP ALM, restoring testing framework stability. Researched and implemented permanent solution to IBM Information Analyzer crashes. Mentored junior staff. Technologies: BMC Remedy/JIRA, UNIX/Linux, Bash, Oracle, PL/SQL, Windows.
Senior Technical Specialist at InfoCentric
November 1, 2014 - September 1, 2017Client: MLC Wealth. Designed and implemented database framework for Oracle APEX (Application Express). Using a Linux platform, created Oracle APEX and PL/SQL solutions for business processes including cashiering payments and reporting services for MLC Cashiering team. Developed applications for superannuation asset reporting and regulatory reporting processes. Technologies: C++, Java, UNIX, Windows, Bash, Oracle.
DevOps Installation Specialist - Linux Packaging and Installation at Alcatel-Lucent Enterprise
July 1, 2014 - September 1, 2014Created Linux installation Bash shell scripts for Defence Science and Technology Organisation application packages. Generated installation wrappers to automate deployment across multiple target machines.
Linux-based ETL Transformation Consultant | Database Technical Specialist | Mentor at Attra
May 1, 2013 - June 1, 2014Linux-based ETL transformation consulting; mentoring; delivered database-related enhancements and deployment automation.
Senior Build, Deployment and Configuration (DevOps) at IBM
July 1, 2012 - November 1, 2012Worked on NBN Co Linux-based billing continuous delivery project using ThoughtWorks GO, Jenkins, Subversion, Mercurial, Ruby, Vagrant, Puppet, VirtualBox, Oracle. Supported PNI project for GNAF data importation into Oracle database.
Transactive SCM | Build Technical Analyst at ANZ
June 1, 2010 - July 1, 2012Configuration, build, and deployment automation using Hudson/Jenkins and Rational Build Forge in Windows and Solaris X86 VMs on ESXi 4.1. Created Oracle SQL and PL/SQL scripts for data migration. Used Rational ClearQuest for defect tracking and Splunk for server monitoring.
SCM Build and Release Manager at DST Systems
April 1, 2010 - June 1, 2010Improved build and release processes. Created Solaris PKG package for HiPort product.
SCM Senior Systems Administrator at Bendigo and Adelaide Bank
December 1, 2008 - December 1, 2009Environment support, management, and provisioning. Provisioned new test environment (DB2 through to SunOS). Supported Mobile applications project. Upgraded automation tools.
Senior Technical Engineer | Senior Technical Specialist at NAB
November 1, 2005 - September 1, 2008Supported test and development environments using CCM deployment tool, VMware, BigFix Linux RPM deployment. Analyzed and implemented SOX compliance deployment via Harvest. Designed and configured Harvest projects for automated deployment to Linux/UNIX test/production environments. Updated Perl and shell scripts. Installed and configured TWiki collaboration platform. Created web-based reports extracting data from Oracle database.
Technical Support - Application Manager at Telstra
December 1, 2004 - October 1, 2005Application Manager for IRM systems register. End-user training, user-group meetings. Managed Apache web server for real-time database. Patch management of RoAccess front-end. Tech handover to Telstra and EDS-I.
Tools and Utilities Developer, Embedded Applications Developer at NEC (Australia)
May 1, 2003 - December 1, 2004Developed tools for application packaging and embedded utilities; contributed to deployment automation.
Oracle DBA, Oracle Developer, Facilities Support at Open Telecommunications
February 1, 2001 - February 1, 2003Oracle DBA/Developer and facilities support; data massaging scripts in PL/SQL; supported test and development databases.
Contractor – Team Leader at HP
September 1, 2000 - January 1, 2001Built eLink clients/servers utilizing Tuxedo middleware; installed HP security suites on HP UNIX.
OO Designer | Developer & Systems Analyst at Majoris Consultancy Services (P) Ltd
April 1, 2000 - September 1, 2000Developed class design for Java-based electronic payments system using Modelistic on Linux RedHat 6.2.
Contractor - Senior Systems Developer at HP
January 1, 2000 - March 1, 2000Built eLink clients/servers utilizing Tuxedo middleware. Created ActiveWorks to eLink Bridge.
SE-ITOO Designer | Developer & Team Leader at SE-ITOO
July 1, 1999 - November 1, 1999Designed software distribution/upgrade module for NEC TNM Satellite communications system. Led team of 3 C++ developers.
Y2K Consultant | Senior Systems Developer (Clearance: Secret) at CSC, Laverton AFB
November 1, 1997 - June 1, 1999Y2K consultant for Defence IT systems; assessed Y2K impact; team leader for migrating 16-bit applications to 32-bit NT 4.0.
Senior Systems Designer at ANZ
April 1, 1996 - June 1, 1997Senior Systems Designer focusing on IT system design and delivery.
Education
B.BUS(DP), Data Processing at Winburne University of Technology
January 11, 2030 - January 7, 2026Qualifications
Industry Experience
Financial Services, Telecommunications, Government, Software & Internet, Professional Services
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