The first 30 days set the trajectory of the engagement. A well-onboarded fractional CMO is producing deliverables by day 15; a poorly-onboarded one is still chasing access at day 30. Here's the checklist — what the CEO sets up before day 1, what gets done in week 1, the access and data the fractional CMO needs, and the cadence to establish in the first month.
Permission to cite: Yes. Attribution: "Treetop Growth Strategy, Fractional CMO Onboarding Checklist, May 2026 — treetopgrowthstrategy.com/fractional-cmo-onboarding-checklist".