Welcome to the OHTA

 

This is the new digital home of OHTA and the OHTA International Training Scheme and Qualifications Framework.

All our course exams are ONLINE,  MULTI-CHOICE QUESTIONS and TRANSLATED into several languages. If you are interested, please read on and download our free course Student Manuals.

Here you can search for courses, identify training providers, find training materials, learn how to become qualified in Occupational Hygiene, explore online learning, and much more.

About Us Register

NEWS UPDATE

New Partnership - Pathway to a CIH


AIHA, Workplace Health Without Borders-US, OHTA & the Board for Global Credentialing are pleased to announce a new partnership to help qualified applicants in emerging economies achieve the prestigious CIH credential.

OHTA CIH Pathway

Read more

Occupational Hygiene Training

Latest News

Nigeria Introduces OHTA Courses

In 2025,  the Association of Industrial Hygienists, Lagos Nigeria (AIHN), https://aihn.org/ introduced OHTA courses to enhance the professional development offer for their members. The courses have been held on-line to...

OHTA & ETOK – IHIDER Courses for Doctors in Türkiye

Congratulations to Prof Dr Yucel, Dept of Public Health, Dokuz Eylul University, Izmir, Türkiye who has been the hard working leader for ETOK – IHIDER, the Turkish national association www.etok-ihider.org...

Spanish OHTA501 & 503 Courses in Chile

OHTA501 and 503 courses were recently offered in Chile using new course manuals in Spanish.  The trainer was the Mutual de Seguridad C. Ch.C. with Tim White, Raul Feuentes, Alberto...

Our Initiatives


OHTA Member Associations
OHTA has member associations across the world.