Cloud and infrastructure.

Design and run the infrastructure client systems live on: compute, networking, storage, backups and the paths between them.

Build the deployment pipelines and the observability that let a two week release be boring.

Own security in practice: access, secrets, patching, hardening, and the evidence a client's audit asks for.

Respond to incidents, find the cause, and change the system so the same one does not recur.

Experience operating production systems, not only provisioning them.

Depth in at least one cloud platform and in Linux, containers and infrastructure as code.

A habit of writing runbooks and automating the second time you do something.

Calm under an incident and honesty in the write-up afterwards.