How should security teams implement PAM as part of zero trust?

Why This Matters for Security Teams

Privileged Access Management belongs inside a zero trust program only when it changes how access is granted, observed, and revoked. A vault alone does not satisfy that requirement. Zero trust expects every privileged request to be evaluated in context, while PAM is meant to reduce standing privilege and make elevated actions attributable. That matters for both humans and non-human identities because service accounts, API keys, and automation often hold the broadest access.

Current guidance from NIST SP 800-207 Zero Trust Architecture treats access as continuously verified, not pre-approved once and forgotten. NHIMG’s Ultimate Guide to NHIs shows why this matters in practice: 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation. In real environments, PAM fails when it is deployed as a ticketing wrapper around standing admin rights instead of a control point for time-bounded privilege.

In practice, many security teams encounter privilege abuse only after a service account has already been used to move laterally or exfiltrate data, rather than through intentional review of each elevated request.

How It Works in Practice

Implement PAM as a runtime control layer that sits between the identity, the target system, and the policy engine. The request should be evaluated before access is issued, then monitored throughout the session, and revoked immediately when the task ends. For human admins, that often means just-in-time elevation, session recording, command filtering, and approval workflows. For NHIs, the same principle applies, but the mechanics shift toward workload identity, short-lived tokens, and task-scoped permissions.

That is where Guide to SPIFFE and SPIRE becomes useful. It reflects the current best practice for proving what a workload is, not just what secret it possesses. Pair that with policy evaluation at request time, using a zero trust model aligned to NIST SP 800-207 Zero Trust Architecture. The operational pattern is:

• Issue ephemeral credentials only for the approved task window.
• Bind elevation to a specific identity, device, workload, and destination.
• Log the full session, not just the login event.
• Revoke or expire access automatically when the task completes.
• Separate emergency access from routine access so it can be reviewed independently.

For NHI-heavy environments, PAM should also enforce secret rotation, ownership, and offboarding. NHIMG research highlights how often that is missed: 71% of NHIs are not rotated within recommended time frames, and only 5.7% of organisations have full visibility into their service accounts. Those gaps are exactly why PAM must connect to inventory, monitoring, and lifecycle controls rather than operate as a standalone vault. These controls tend to break down when legacy applications require long-lived shared secrets, because the application design prevents clean session attribution and short-lived credential replacement.

Common Variations and Edge Cases

Tighter PAM usually increases operational overhead, so teams have to balance stronger containment against the friction of approvals, break-glass handling, and legacy compatibility. Best practice is evolving, but there is no universal standard for whether every privileged action must pass through the same workflow. High-risk systems often justify stricter controls, while low-risk automation may need narrower guardrails to avoid breaking delivery pipelines.

One common edge case is third-party and outsourced administration. PAM can control the session, but it cannot compensate for unclear ownership or poor vendor visibility. NHIMG’s The State of Non-Human Identity Security reports that 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, which makes privileged delegation harder to govern. Another edge case is shared emergency accounts: current guidance suggests isolating them, recording every use, and reviewing them separately from normal admin access, but many environments still rely on them for continuity.

Static PAM models also struggle with autonomous workloads that chain tools or shift tasks at runtime. In those cases, the control should follow the workload identity and the approved intent, not a permanent role. That is where policy-as-code and just-in-time elevation become essential rather than optional.

Related resources from NHI Mgmt Group

• How should security teams implement zero trust IAM in cloud-native environments?
• How should security teams implement Zero Trust SaaS in practice?
• How should security teams implement zero trust for privileged access?
• How should security teams implement continuous authorization in zero trust environments?