What I know, and how well.

Linux

System administration

Networking

Bash

Incident response and RCA

Bare metal and datacentredormant

100+ servers across two datacentres. Ended 2019.

AWS

Amazon EKS

Amazon ECS and Fargate

Amazon VPC and endpoints

AWS IAM

Amazon S3

Amazon RDS and Aurora

Azure and AKSdormant

A 30-cluster AKS fleet across three continents, but only through 2025.

Google Cloud and GKEdormant

ETUS was the real depth. Dormant since 2023.

AWS Transit Gatewaydormant

Designed the hub-and-spoke, then handed it on.

AWS Control Tower and Organizationsdormant

Amazon SageMakerdormant

AWS Gravitondormant

AWS Secrets Manager and Credstashdormant

Amazon CloudFrontdormant

Kubernetes

Six years of span, four active. The 2023–2025 gap was all ECS.

Docker

GitOps

Three mechanisms across three clouds — GKE, Flux on AKS, Argo CD on EKS.

Helmdormant

Wrote charts and built custom packages. Authorship, not consumption.

Argo CDdormant

Applications and ApplicationSets, with Helm and Kustomize integrated. Kojo only.

Kustomizedormant

Kargodormant

Operated it as a platform user. Did not architect or deploy it.

Fluxdormant

Operated and debugged reconciliation. Did not design the setup.

Karpenterdormant

Terraform

Introduced it at Dock in 2016, during the move to AWS.

CI/CD

GitHub Actions

Packerdormant

Hardened PCI-DSS AMIs, calling Ansible and Bash. Immutable infrastructure on EC2.

GitLab CIdormant

Puppetdormant

Ansibledormant

Only at Dock, on the cloud migration. Dormant since 2019.

Atlantisdormant

CircleCIdormant

Jenkinsdormant

Site reliability engineering

Observability and monitoring

Datadog

SLO and SLI

99.99% at ETUS; 99% of API requests under two seconds at Kojo.

Amazon CloudWatch

OpenTelemetrydormant

Org-wide rollout at Kojo, end to end.

Prometheusdormant

Essentially Sight Machine only.

Grafana

Four engagements. Start year not yet confirmed, so no figure is claimed.

PagerDutydormant

Sentrydormant

Lokidormant

Operated it. Never had to configure it.

PostgreSQL

Performance tuningdormant

Tomcat and JVM at Dock (84% off the connection pool); Node heap and Postgres indexing at Kojo.

FinOps and cost optimisationdormant

87.5% at CoinList; CI at near-neutral cost at Kojo.

Redisdormant

MySQLdormant

Elasticsearch and OpenSearchdormant

Architected and implemented catalogue search at 4 Elements Music. Not a mastery claim.

Apache Kafkadormant

Part of the stack underneath me at Sight Machine. Operated, not mastered.

PCI-DSSdormant

Provisioned the infrastructure that got the certification in three months.

VPN and IPsecdormant

Firewallsdormant

OIDC federationdormant

Removed long-lived AWS credentials from the delivery pipeline.

AI-assisted development (Claude)

ddogctl was built end to end this way, as was the Kojo CI migration.

Python

In my stack since 2016. I read Python and I ship it with AI assistance — I designed and published ddogctl that way. I would not claim fluency writing it from scratch unassisted.

Java and Springdormant

Application server tuning, not development.

Node.jsdormant

Ruby on Railsdormant

Djangodormant

GraphQLdormant

Technical documentation and runbooks

Jira and Confluence

Team leadership and mentoringdormant

Founded and ran the SRE team at ETUS; mentored engineers at Caylent.