Who has to be trained
§1910.146(g) requires training for every employee whose duties fall under the permit-space programme — authorised entrants, attendants, entry supervisors, and any rescue-service employees. The scope also implicitly covers anyone who tests atmospheres, isolates energy, or issues permits on the employer's behalf.
Training is proportional to the role. An attendant needs deeper detail on communication and rescue-summoning procedures; an entry supervisor needs the permit-issuance and acceptable-condition verification content; an entrant needs hazard recognition and self-evacuation triggers. Pair training with the [confined space entry permits](/resources/confined-space-entry-permits) pillar so trainees know where each element they learn lands in the permit workflow.
The four retraining triggers
OSHA does not set a fixed retraining interval. Instead, §1910.146(g)(2) lists four trigger events that each require retraining: (1) a change in the employee's assigned duties; (2) a change in permit-space operations that presents a hazard the employee wasn't previously trained on; (3) inadequacies in the employee's knowledge or use of the procedures indicate deficiencies; and (4) whenever the employer has reason to believe there are deviations from the programme or new hazards.
In practice, most enterprises pair the trigger-based rule with a fixed 12–36 month refresher cycle. That serves both OSHA and any downstream customer or ISO 45001 audit expectations.
What has to be in the syllabus
At minimum: recognition of confined spaces at the workplace, the permit-space programme content, hazards of the specific spaces employees will enter, use of testing and monitoring equipment, PPE and rescue equipment operation, communication procedures, and role-specific duties from §1910.146(h)–(j).
The standard also expects trainees to acquire the 'understanding, knowledge, and skills necessary for the safe performance of the duties assigned' — training records should show demonstrated competence, not just attendance.
Certification records that satisfy an inspector
§1910.146(g)(4) requires the employer to certify training with a written record that includes the employee's name, the trainer's signature or initials, and the dates of training. That's the minimum; competent programmes also record the syllabus version, the specific permit spaces covered, and a scored competency check.
Retain the certification for the duration of the employee's assignment plus a reasonable audit window. Keep it accessible on the permit itself — most digital permit systems, including SafeGuard EHS, pin the authorised roster to each permit so an inspector sees the linked certificates in one view.
How long is confined space certification valid?
OSHA doesn't say. The certification stays valid until one of the four retraining triggers hits — a duty change, an operational change, an observed deficiency, or a suspected programme deviation. In practice, use a 12–24 month refresher for entrants and attendants, and 12 months for entry supervisors and rescue-team members.
Ready to run this at scale? See the [confined space entry permits](/resources/confined-space-entry-permits) pillar for how training records tie into permit issuance, then [book a demo](/book-demo).