For U.S. ground transport, hazmat employees must complete recurrent training at least once every three years (49 CFR 172.704(c)(2)). A new hire — or anyone taking on a new hazmat job function — must be trained within 90 days, and may work only under the direct supervision of a trained employee until then (172.704(c)(1)). If you ship by air under IATA, recurrent training is required every 24 months (two years) — stricter than the DOT cycle. Training records are kept for the duration of employment plus 90 days.
The two clocks: initial and recurrent
Hazmat training runs on two timers. The first is the 90-day clock: a new hazmat employee, or an existing one who takes on a new job function, must be trained within 90 days. In the meantime they’re not grounded — they can do the work, but only under the direct supervision of someone who’s already trained.
The second is the three-year clock: once trained, every hazmat employee must complete recurrent training at least once every three years (49 CFR 172.704(c)(2)). Many companies run it annually to stay comfortably inside the window, but three years is the regulatory maximum for ground transport.
Who actually needs the training
The rule applies to every hazmat employee — a broader group than most people assume. It’s anyone whose job can affect the safety of transporting hazardous materials, including people who:
- Classify, select packaging for, or fill packages with hazmat
- Mark, label, or placard, or prepare shipping papers and declarations
- Handle, load, unload, or segregate hazmat
- Operate a vehicle that transports hazmat, or
- Supervise or direct any of the above
If a role touches the shipment’s compliance, that person needs training — not just the warehouse or the driver.
What each round of training has to cover
A complete training cycle isn’t a single video. Under 172.704(a) it includes general awareness/familiarization, function-specific training that matches the employee’s actual duties, safety training, and security awareness training. Employees of companies required to maintain a security plan also need in-depth security training. The function-specific piece is where most audits find gaps — generic training that doesn’t match what the person actually does won’t satisfy it.
The records you have to keep
Training isn’t done until it’s documented. For each hazmat employee, keep a current record that includes their name, the completion date of the most recent training, the training materials (or a description), and the trainer’s name and address, plus certification that the employee was trained and tested. Keep it for as long as they’re employed and for 90 days after they leave (49 CFR 172.704(d)).
Need to get your team trained or re-certified? DGM runs DOT, IATA, and IMDG hazmat training — function-specific to what your people actually ship, with the records you need on file.
New to this? Start with the basics: the 9 classes of hazardous materials.
Frequently asked questions
How often is recurrent hazmat training required?
At least once every three years under U.S. DOT rules (49 CFR 172.704). For air shipments under IATA, recurrent training is every 24 months (two years).
When does a new employee need hazmat training?
Within 90 days of employment or of taking on a new job function. Until trained, they may perform hazmat functions only under the direct supervision of a trained employee.
Who is considered a hazmat employee?
Anyone whose job affects transport safety — classifying, packaging, marking, labeling, preparing papers, handling, loading, unloading, transporting, or supervising those tasks.
How long must training records be kept?
For as long as the employee is employed, plus 90 days after they leave (49 CFR 172.704(d)).
What must the training cover?
General awareness, function-specific (matched to real duties), safety, and security awareness training — plus in-depth security training where a security plan is required.
Sources
- 49 CFR 172.704 — Training requirements (initial within 90 days; recurrent at least every 3 years; required components; recordkeeping). eCFR
- 49 CFR 171.8 — Definition of “hazmat employee.” eCFR
- IATA Dangerous Goods Regulations — recurrent training every 24 months (air). IATA
This article is provided by DGM New York for general educational purposes and reflects 49 CFR as published on eCFR. It is not legal advice and is not a substitute for the current regulations or a qualified dangerous-goods safety advisor. Training requirements vary by mode and role; always verify against the current eCFR text and the applicable international rules (ICAO / IATA, IMDG) for your operation.