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David Kelertas

Hands-on DevOps & Platform Engineer — 25 years building infrastructure that matters.

Specialising in secure, scalable DevOps and platform engineering across financial services and critical energy infrastructure — Infrastructure as Code, cloud-native delivery, and hands-on CI/CD in complex hybrid environments.

Experience

DevSecOps Engineer
AEMO (via Infosys)  ·  2026 – present
On assignment at the Australian Energy Market Operator (AEMO), via Infosys. Adapting Azure DevOps YAML pipelines to automate onboarding of new applications — project and git repo creation, policies, build and deployment pipeline templates, user creation, and permissions (“Azure DevOps as Code”). Automating database schema deployments with Flyway, and test environment refreshes using database cloning, subsetting and anonymising tools.
Senior DevOps Engineer - Azure
TelstraSuper  ·  Nov 2018 – May 2026 (7.5 years)
Drove full Azure cloud transformation from on-premises hybrid infrastructure. Supported and extended TeamCity/Octopus through the transition, then Azure DevOps. Deployed Kubernetes clusters with disaster recovery. Built AI infrastructure supporting computer vision and chatbot platforms. The role ended when TelstraSuper merged.
Manager, DevOps & Application Support (secondment)
TelstraSuper  ·  Jul 2024 – Jun 2025
12-month secondment alongside my hands-on Senior DevOps role, then back to engineering full time. Led 8 direct reports across cross-functional teams. Oversaw CI/CD automation, cloud architecture governance, and DevSecOps practices across the organisation.
Developer Support and Cloud System Engineer - AWS
TechnologyOne  ·  Dec 2011 – Feb 2017 (5 years)
Migrated hundreds of VMware ESX and legacy systems to AWS, automating Windows/IIS EC2 rebuilds with CloudFormation, PowerShell and Puppet. Modernised delivery from monolithic on-premises releases to multi-tenant SaaS on AWS, and migrated and maintained Oracle and MSSQL tiers. Moved teams from TFS to TeamCity and Jira/Confluence.
Service Delivery, Support & Systems Administration
Boeing (Jeppesen and Preston Aviation)  ·  2001 – 2011 (10 years)
Several roles, from my origins in Linux and the server room: hands-on with physical servers, Linux, Solaris and AIX Unix clusters, Oracle high availability, SAN/NAS and VMware. Moved into service delivery of airport resource management and simulation systems for major international airports, running product demos, floor walking during go-lives and managing releases and change governance. Sole on-site rep for rollouts at Vancouver, Beijing, Kuala Lumpur, Hong Kong and Gatwick.

Technical Skills

Cloud

Azure (Key Vault, ARM, AKS, App Service, DevOps), AWS (CloudFormation, EC2, S3), Supabase, Cloudflare Workers

Infrastructure

IaC, CI/CD (Azure DevOps, GitHub Actions), Kubernetes, GitOps (Flux CD), Service Fabric, Linux (RHEL, Arch), disaster recovery, Terraform (homelab and study)

Scripting

PowerShell, Bash, YAML, Python (growing via the Kubecraft homelab masterclass)

Databases

Azure SQL, MSSQL, Oracle, MySQL, Postgres (Supabase), Flyway schema deployments, database cloning, subsetting and anonymising

Education & Certifications

Bachelor of Computing (Honours) — Deakin University
AWS Solutions Architect — Associate2015
Red Hat Certified Engineer2005
Elevate Leadership Program — Michelle Sales Leadership2023

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