Center for Environmental Research and Technology Inc.

  • Unparalleled Customer Service
  • Ongoing Technical Support
  • Over 50,000 Courses Taken
  • Serving Students Since 1986

Over 50,000 Course Enrollments - and going strong!

The Center for Environmental Research and Technology Inc. is the leading educational resource for radon measurement, mitigation, and CE courses nationwide. CERTI was established in 1986 to fill the need for better, more convenient education for professionals, and has been in the forefront of radon education ever since. CERTI understands that all students learn differently. From our entry level courses to our continuing education courses, CERTI includes a variety of audio, visual, and live-taught course recordings to optimize the student experience and increase comprehension. Relevant content and industry-driven information is taught by Doug Kladder, lead instructor and founder of the Center for Environmental Research and Technology Inc. CERTI has also regularly collaborated with many industry experts to ensure the classes are effective and pertinent.

Our Valued Students

A Sample of the many excellent reviews and ratings from our valued students.

  • Excellent!!

"I really appreciate CERTI courses.  They are, by far, the best."

Karen Student

Exam Prep Courses now available to help prepare YOU for the NRPP or NRSB Measurement and Mitigation Exams!

From the Blog

Here are some resources that can help with your Radon business or training.

Radon Health Effects: Are We Moving Away From Science?

We recently received a solicitation to review a

What Good is a DIY Book for Radon Professionals??

A radon professional coming to the CERTI site