Your First 90 Days: A 30-60-90 Day Plan for a New Job

Your first three months are when colleagues decide what kind of person you are, and those judgements are formed on very little evidence. The two failure modes are opposites: arriving with a mandate to change everything, or spending twelve weeks quietly observing and delivering nothing. A 30-60-90 day plan avoids both.

Days 1–30: learn deliberately

Your only real deliverable this month is understanding — but understanding pursued deliberately, not passively.

• Ask your manager the defining question in week one: "What would make you say, in six months, that this hire went well?" Write the answer down. It is your actual job description.
• Meet fifteen people. Twenty minutes each, across teams. Three questions: what do you do, how does your work touch mine, what should I know that nobody will think to tell me?
• Learn the systems properly. Whatever your team runs on, become genuinely fluent rather than adequate.
• Write everything down. Keep a running document of processes, names, acronyms and unwritten rules. Your questions are free this month and expensive later.
• Deliver one small, visible thing. A tidy report, a documented process, a fixed spreadsheet. Small and finished, not ambitious and pending.

Resist the urge to propose changes. You do not yet know why things are the way they are, and "at my last company we did X" in week two rarely lands well.

Days 31–60: contribute and diagnose

You now know enough to be useful and to see problems clearly.

• Take full ownership of your core responsibilities. No more supervision than any established colleague needs.
• Identify the three real problems you are positioned to fix — and, importantly, why they have not been fixed already. There is usually a reason, and knowing it is the difference between a proposal and a naive suggestion.
• Fix one of them. Choose the smallest one with the most visible benefit. Early credibility comes from finished work, not ambitious plans.
• Ask for feedback explicitly. "Is there anything I am doing that you would do differently?" Ask your manager and one peer. It is much easier to correct a small impression at week six than a settled reputation at month six.
• Learn how decisions are really made — who is consulted, what evidence persuades, how disagreement is handled here.

Days 61–90: deliver and commit

• Complete something that matters and can be described in one sentence with a number attached.
• Propose one improvement properly — the problem, the cost of leaving it, your proposal, what you need. You now have the standing to be heard.
• Run a 90-day review with your manager. Bring the answer they gave you in week one and go through it point by point. Ask what to prioritise next quarter.
• Set your next-quarter goals in writing, agreed with your manager.

A written plan is worth more than a remembered one

Put it on one page: three objectives per phase, each with a deliverable and a date. Share it with your manager in week one. Two things happen — you get corrected early if you have misread the priorities, and you signal seriousness before you have had a chance to prove anything.

Habits that matter more than they should

• Arrive on time, consistently, for the whole 90 days.
• Answer messages within the working day.
• Never miss a commitment silently. Flag slippage early — nobody minds a delay they were warned about.
• Learn people's names and use them.
• Say "I do not know, let me find out" instead of improvising an answer.

Three months in, you want two things to be true: your manager trusts you with work unsupervised, and at least one colleague outside your team knows what you are good at. Achieve both and the rest of the year is much easier.