There's a moment every new CTO knows. It's your first Monday. You have admin access, a calendar full of introductions, and a head full of opinions about the codebase you skimmed over the weekend.
Every instinct says: prove yourself. Find something broken and fix it. Show the team you're technical, show the CEO you're fast, show everyone the hire was right.
That instinct is how CTOs quietly lose their first 90 days.
I've spent years doing this job as a fractional and interim CTO — walking into companies mid-crisis, mid-growth, mid-political-meltdown, usually under NDA, which is why I publish under a pen name. The pattern is remarkably consistent: the technical work is rarely what kills a new CTO. What kills them is spending their scarcest resource on the wrong problem in the first three days.
Your scarcest resource is not time
