Managed security provider due-diligence checklist

Questions to put to every shortlisted MSSP, MDR or SOC provider before you sign, grouped by scope, people, data, response, contract and exit.

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Scope

Response

People and data

Contract

Exit

Use this checklist on every shortlisted provider so that the answers are comparable. Ask for written answers, not a sales call, and keep them with the contract. A provider that cannot answer a scope or response question clearly before you sign is unlikely to answer it clearly during an incident.

The items follow the same order as the due-diligence guide: scope first (what is covered), then response (what the provider will actually do), people and data (who touches your information and where it goes), contract (price, renewal and remedies) and exit (how you leave). Tick an item only when you have the answer in writing.

How to use the results: a missing tick is not automatically a reason to reject a provider, but it is a gap you must either close in the contract, cover yourself or accept knowingly. Record which you chose. Weight the items that matter most for your business, for example data location if you hold health information, or overnight response if you run a 24-hour operation, and score providers against those weights in the selection method.

This checklist is general information, not legal or technical advice. For a large contract, an incident-response plan or a regulated business, get advice from a lawyer and an independent security adviser.

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