A security review is the stage in an enterprise deal where a buyer's security or IT team evaluates a vendor's data handling, infrastructure, and compliance posture before signature, often introducing a stakeholder who wasn't part of any earlier conversation in the deal.
A security review usually sits dormant for most of a sales cycle and then activates all at once, late, right when a deal looks closest to done. That timing is exactly what makes it dangerous to an unprepared stakeholder map: the reviewer running it is frequently someone nobody on the selling side has ever spoken to, and suddenly they're the only person whose opinion decides whether the deal moves.
A security review kicking off is itself information. It usually means the deal has moved further internally than the visible conversation with a champion would suggest, and it's a cue to update the stakeholder map immediately rather than wait to be told who else needs to be looped in. Treating a security review as a fixed checklist item to hand off once and forget misses that it's also a signal about where the deal actually stands.
Legal, procurement, and a security review tend to activate on a similar late timeline, each gating a different piece of the path to signature. None of them are things a champion can speak for on your behalf, no matter how well-intentioned or senior that champion is. Their assurance that "security shouldn't be an issue" is a guess, not a verified fact, until the actual review has started and someone specific owns it.
The moment a security review is mentioned, even informally, treat it as a trigger to identify the specific reviewer and get a named contact and a dated milestone attached to it, the same way any other stage of the deal gets tracked. Verify progress with something concrete, a calendar invite, an email confirming a questionnaire went out, rather than relying on the champion's paraphrase of a conversation nobody else was in.
Sellers assume a security review is a formality that runs in the background without needing attention, right up until it stalls a deal that looked otherwise finished. The bigger mistake is not adding the reviewer to the stakeholder map the moment the review is mentioned, which is how a deal can go quiet for weeks over a question nobody on the selling side even knew was being asked.
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