The First 90 Days

Starting a new job as a Customer Success Manager can feel like being handed a puzzle with half the pieces missing. You're expected to build relationships with people you've never met, understand a product you didn't build, and already know what "good" looks like, all while everyone around you seems to speak in acronyms.

The First 90 Days closes that gap.

This isn't another 300-page book about the theory of Customer Success. It's a short, practical field guide built to be looked up, not read cover to cover, so a new CSM (or the manager onboarding them) always knows exactly what to do this week, what a good version of that looks like, and where to find help when something doesn't go to plan.

What's inside:

• Five ramp phases, Day 1 to Day 90 - Orientation, Shadowing, First Ownership, Full Book Assignment, and Independence & Certification. Each phase fits on a page: a quick-reference checklist, the one thing that matters most, and the most common mistake to avoid.
• A Core Competency Checklist covering product knowledge, tool fluency, soft skills, and escalation protocol - doubles as a manager's scoring sheet for the 30/60/90 review.
• A full Template Library - an intro email, kickoff call agenda, QBR deck outline, health-score rubric, and escalation script, ready to use, not just described.
• A Manager's Companion that mirrors all five phases from the manager's side: what to check, red flags to watch for, and the exact questions to ask at each milestone.
• A plain-English glossary and metrics cheat sheet, so no piece of CS jargon goes unexplained.
• Recommended Reading for once the first 90 days are behind you.

Who it is for: new and newly hired Customer Success Managers in their first 90 days, and the managers responsible for onboarding them. It is deliberately narrow - this is not a full Customer Success methodology, it's the missing operating manual for the first three months on the job.

The First 90 Days is part of the Customer Success library from Client Connection Consulting, alongside Say It Plainly (a guide to better customer emails and conversations) and The Compounding Customer (the leader's guide to Customer Success strategy and economics).