Zero Trust Security for Small Teams: A Realistic Starting Point

Zero trust is often sold as a product suite. It isn't one — it's a principle: never grant access because of where a request came from. A ten-person team can apply that principle meaningfully in a few weeks, without buying an enterprise platform.

Start with identity, not the network

• Put every SaaS tool behind single sign-on so revoking one account cuts all access.
• Require phishing-resistant MFA (hardware keys or passkeys) for admin and production access; SMS codes are not enough.
• Write down an offboarding checklist and time it — access should be gone the same day, not the same month.

Then least privilege

• Default every new account to read-only; grant elevation deliberately and temporarily.
• Separate production from everything else, with distinct credentials and no shared admin logins.
• Review who can reach production data every quarter; it drifts faster than anyone expects.

Then your own services

Internal APIs sitting on a private network with no authentication are the classic small-team gap: one compromised container and everything is reachable. Give every service its own identity and credential, scope its permissions to what it actually calls, and log the calls.

• Short-lived, per-service credentials over long-lived shared secrets.
• Secrets in a managed vault, never in environment files in the repo.
• Encryption in transit between internal services, not just at the edge.

What you can safely defer

Micro-segmentation, a dedicated SIEM, and continuous device-posture enforcement are real parts of a mature program, but they are not where a small team should start. Identity, privilege, and service authentication close the failure modes that actually get small companies breached.