Maintain Certification

This web page is an overview of the CM program and its purpose. Additional detail is available for each of the CM Program Elements and CM Categories.  

Purpose of the CM Program
The purpose of the Certification Maintenance (CM) program, which began in 1979, is to ensure that Diplomates develop and enhance their professional-level industrial hygiene knowledge and skills during the time period that they are certified by ABIH®. 

The CM program primarily emphasizes technical advancement but does make allowances for some professional development activities when there is an environment, safety or health aspect.  Generic career skills development or career advancement may occur as a result of being a Diplomate but it is not a focus area for the ABIH CM program.

Who is an ABIH Diplomate?
An ABIH Diplomate is a person who has met the qualifications for education, experience, and examination; and, has continued to meet the obligations for maintaining certification. Every 5 years, a Diplomate maintains their certification by passing the Examination (if eligible) or by submitting an acceptable CM Worksheet.

The CM cycle length is based on the assumption that the knowledge and skills to be a professional-level industrial hygienist evolve over time but do not change radically from year-to-year. This approach is also consistent with the CIH® Job Analysis which is done every 5-7 years and used to identify the current knowledge and skills possessed by a professional level industrial hygienist with three to four years of broad scope professional level practice.

In addition to submitting a CMW or passing the Exam, each Diplomate agrees to:

Two Cycle Windows
Diplomates are initially assigned to one of two CM cycle windows based on their Exam pass date. Each CM cycle last 60 months.

  • Spring Pass: Starts on July 1 and ends on June 30
  • Fall Pass: Starts on January 1 and ends on December 31.

CM By Worksheet
Most Diplomates choose to maintain their certification by submitting an acceptable CM worksheet. Diplomates are responsible to plan and track their own professional development activities that are IH-related and fall within the CM program Categories of Active Practice, Professional Committees, Publications, Education, Teaching/Presenting and Approved Other Activities. In addition to IH-related topics, safety and ethics education is allowed in Category 4 (Education).

If a Diplomate has a question about an activity’s eligibility for CM credit, see the CM Program Categories. Contact ABIH if additional clarification is needed. 

Diplomates are advised to download a copy of the CM worksheet (from the ABIH Document Library) and to retain sufficient proof of participation to support the information entered on the CMW. See the "Records" section of each CM Category for a list of acceptable proof-of-participation records.

Alternately, to recertify by examination, the Diplomate may take the exam during any or all of the three windows immediately preceding the Certification Expiration Date.

Key Dates:There are four key dates that every Diplomate should know:

Key Date Description Where Located?
Cycle Start First day to earn CM credit during the cycle Calculated from Cycle End Date
Cycle End Last day to earn CM credit (60 months after the Start) My Account

Last day to submit the CMW before penalty (1 month after End Date).

Note: The CMW can be submitted up to 5 months before its due date.

My Account

Certification Expiration

5 months after the Cycle End date Paper Certificate


Diplomate Identification and Nomenclature
All active Diplomates in good standing are listed in the ABIH Public Roster on the ABIH web site. It is ABIH pollicy that the names and certification types of all Diplomates will be listed. The Diplomate may choose to share additional information which can be managed at My Account. The term "in good standing" means that the Diplomate is paid up on all fees and is not involved in an ethics dispute. Diplomates in good standing are also listed in the ABIH Private Roster, which is accessible through My Account. The Private Roster provides additional contact information if the Diplomate chooses to share it. 

Upon request, each Diplomate will be provided a wallet card at the time of annual fees payment.

ABIH Diplomates are encouraged to use their ABIH-awarded certification terms including the registered trademark symbol as follows:

  • Certified Industrial Hygienist® or CIH®
  • Certified Associate Industrial Hygienist® or CAIH®

The above terms are registered with the U.S. Patent and Trademark Office as is the ABIH logo and the terms American Board of Industrial Hygiene and ABIH.

Additional Resources - Get started or get refreshed with these key resources: