Every organization pursuing ISO compliance eventually needs someone to audit against the standard. But “quality auditor” isn’t one job — internal auditors and lead auditors work at genuinely different scopes, and confusing the two leads to hiring or training the wrong role for what you actually need.
Internal Auditor
An internal auditor assesses their own organization’s processes against a chosen standard — checking that documented procedures are actually being followed on the floor. This role is typically part-time, folded into an existing quality or operations position, and focused on catching gaps before an external audit does.
Lead Auditor
A lead auditor is qualified to plan, direct, and report on a full audit — internal or third-party — and to manage a team of auditors through the process. This is a more formal qualification, often required for anyone signing off on a certification audit rather than just participating in one.
Which Standards Get Audited
- ISO 9001 — general quality management systems
- ISO 13485 — medical devices
- AS9100 — aerospace
- ISO/IEC 17025 — testing and calibration laboratories
- ISO 14001 — environmental management
- IATF 16949 — automotive
Choosing the Right Path
If you need someone to keep your own system audit-ready year-round, internal auditor training is the fit. If you need someone qualified to lead certification audits or manage an audit team, lead auditor training is the one to pursue. ASQ’s quality auditing training catalog covers both paths across the standards above.
Related reading: for a rundown of exactly which standard applies to your industry, see Which Quality Standard Actually Applies to You?
