Certification is valid for five (5) years. Technicians certified through the NBTC program will be reminded by the Asphalt Institute one (1) year in advance of their expiration date, and again at six (6) months prior, to prepare for re-certification. Re-certification is achieved by attending the NBTC program’s review course and successfully passing the examinations. This continuing education component, which is used by many states as a requirement to renew the license of professional engineers, ensures that the technician is current with the most recent changes in asphalt binder testing procedures and laboratory practices. Please complete the application form to begin the process.