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Industry and Occupation Coding Training

NIOSH offers a free 2 day training class for coding industry and occupation (I&O) data. The class provides instruction on coding to the CDC/Census I&O classification system including how to use the NIOSH Industry & Occupation Computerized Coding System (NIOCCS).

If you are interested in attending a class, please fill out the form below and NIOSH will email you information about available upcoming classes.

A training class for coding industry and occupation using the NIOCCS system will take place May 13-14 in Des Moines, Iowa. For more information please email

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