
40% of executives fail in their first 18 months. For CTOs, the curve is steeper and lonelier than any other C-suite seat. A playbook for the first 90 days: Day 0 prep, Week 1 discovery, the STARS diagnosis, early wins, long-term roadmap, and the security conversation most new CTOs postpone until it's too late.


What's inside?
Two checklists in one, across 15 device and infrastructure types:
Even to make plans, you need a plan - pre-start networking, industry research, personal success metrics, and the questions to ask before day one.
Get to a 360° view - the discovery sprint, tech stack audit, and building relationships with the CEO, CFO, product leaders, VPs, and sales.
Score the important stuff - the STARS diagnostic (Start-up, Turnaround, Realignment, Sustaining Success) and securing early wins without falling into the four classic traps.
What you’ll learn
By the end, you'll be able to:
Walk in on Day 0 with a plan, stakeholder map, personal success metrics, and a preliminary security read, instead of discovering it all in week two.
Diagnose which of the four STARS situations you've inherited because the same playbook does not work for a start-up, a turnaround, a realignment, and a sustaining-success org.
Talk to the CEO about vision, the CFO about ROI, product about customer impact, and sales about enablement in each one's language, not yours.
Ship early wins that build credibility (MFA, critical patches, enabling features already in the stack) without falling into the four classic traps: losing focus, ignoring the business situation, missing the culture, letting means undermine ends.
Define CTO-level KPIs - deployment frequency, system uptime, CI/CD adoption, tech debt reduction and present a 6–12 month plan the C-suite will back.
Only 26% of organizations have strong cross-functional cooperation between security and engineering. The CTO who fixes that in year one gets 10× leverage for the rest of their tenure.
Who’s this for?
Read this if you're a…
First-time CTO (or taking the seat at a new company) and the handover was… light.
Founder-CTO moving from "developer #1" to strategist, communicator, and visionary and trying to work out what to let go of at each step.
VP of Engineering about to make the jump, who wants the playbook before, not after.
CEO or board member hiring a new CTO and wants to know what to expect and what to ask for in the first 90 days.