The Electrotechnology Testing Accreditation Advisory Committee (ETT AAC) advises NATA on technical issues related to information technology and telecommunications equipment testing, software testing, electrical safety testing, high voltage testing, electromagnetic compatibility, and other activities.

The Materials Characterisation Accreditation Advisory Committee (MC AAC) advises NATA on technical issues related Materials Testing activity.

The Geotechnical and Civil Construction Materials Testing Accreditation Advisory Committee (GCCMTAAC) advises NATA on technical issues related civil construction testing and investigation.

The Integrity of Equipment and Structures Accreditation Advisory Committee (IES AAC) advises NATA on technical issues related to Non-destructive Testing of equipment and structures.