Andrew Warner
Andrew owns the architecture layer. He scopes the engagement on the diagnostic call, designs the AI workflow shape against the team's actual problem, runs the four-approval document with the client CTO, and stays on as the senior reviewer when complex workflow design choices come up. He is the technical backstop. He is the one who has done this for a DTC subscription brand whose CTO countersigned.
Andrew's signature artifact is the 4-approval CTO alignment document: GitHub source-of-truth structure, tool calls plus Secret Manager, BigQuery in an isolated GCP project, Paperclip orchestration on a client-only VPS. The CTO countersigns. The CMO walks into her next board meeting with the architecture defended.