Starting a new job is as much a people challenge as it is a performance challenge. The relationships you build — or don't build — in the first 90 days shape everything that comes after.
The first step is mapping the organization. Figure out who reports to whom, who the real decision-makers are on the questions that matter to your work, and which departments you'll need to collaborate with regularly. The formal org chart tells you part of this story; observation and conversation fill in the rest. Pay attention to who speaks with authority in meetings, whose opinion gets deferred to, whose emails get responded to fastest.
Classify the people around you based on how they work. Some colleagues are highly reliable — when they say they'll do something, they do it. Others are political players who are primarily focused on optics and positioning. Others are simply slow or inconsistent. You need to learn which is which before you're depending on someone for something important. Test this early with small asks — a piece of information, a quick intro, a straightforward handoff. How they handle small things predicts how they'll handle big ones.
Identify your internal allies. These are the people who will speak well of you when you're not in the room, who will give you honest feedback, who will flag opportunities your way. Allies aren't made transactionally — they're built through genuine interest, reliability over time, and showing up for others before you need anything yourself.
One tactical note: the early weeks are your best window for scheduling one-on-one introductory meetings across the organization. Everyone expects it from a new person. A few months in, the same outreach feels unusual. Use the onboarding window to meet as many people as you can — inside and outside your immediate team.
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