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CHR is the company you call for quality, personalized, and cost-effective corporate health examination and service needs. 
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"The Industry Leader in Occupational Health Since 1986!"

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(800) 867-0933


1375 Piccard Drive

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Rockville, MD 20850

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Training Courses

AAOHN: Respiratory Protection Education Program for Healthcare Workers - Available at No Charge.

Online Learning



Commercial Driver Medical Examiner Online Training via ACOEM




Spirometry, Spirometry Refresher, Respirator Fit-Testing Training Courses


Online Courses:

Spirometry Refresher

Spirometry Training


More Information:

Dr. Mary Townsend



CAOHC Certification
CAOHC Re-Certification
NIOSH Certification


Course Collections:



The DOT Examiner's Most Trusted Resource! For a full listing of our books visit OEM Press.

Medlock Consulting is a physician search firm dedicated to locating, evaluating, and facilitating the placement of quality physicians in superior environments. To us, this means never taking shortcuts and always maintaining professional and personal integrity.


Nyla Medlock

Medlock Consulting

Phone 806-744-5250

Cell 806-239-NYLA(6952)

"Defining the Future of Physicians Globally"

Email Nyla


International Safety Systems, Inc. (Global EHS Service Provider)
New: Webinar Brochure



Occupational Health Connections, Inc. (OHC) is a distinguished leader in occupational and employee health staffing and recruitment. For job opportunities, please visit: OHC website



Visit Relief EHS, LLC
Relief EHS is uniquely qualified to provide answers to your environmental health & safety (EHS) questions, make it easier for your business to comply with regulations, and help you achieve EHS goals while minimizing costs and potential liability.



PKB Consulting, LLC
Patricia K. Bertsche, PhD, FAAOHN - Occupational Health & Wellness Consultant, Leader in Global Occupational Health Program Development & Evaluation - Email Pat



CHR Newsletter - February 22, 2018

The quality of CHR's services and the services provided by the clinics in our network is very important. Thank you for your feedback and support. Our clients say it best...

"I would verify that the overwhelming majority of occupational health professionals support CHR's excellence, integrity, credibility, and contributions to occupational health services delivery."

Technology is Distracting

With continually-emerging technologies such as smartphones and in-car entertainment, driving is becoming increasingly risky. Reducing these preventable accidents needs to be a team effort. Americans need to step back and realize that multitasking while driving is not the answer.

Is America's Hazmat in Good Hands?

Yes, for now. But the world will need a new crop of dedicated dangerous goods professionals to ensure hazmat reaches its destination, safely and on time. Once these chosen few professionals enter the world of dangerous goods, most never leave.

Are 3D Printers Bad for Worker Health?

Some printers produce large amounts of particles, causing respiratory symptoms in workers. Taking steps to reduce the indoor air pollution produced by 3D printers and following a health program can help maintain cleaner, healthier air for workers.

Release Date Set for Global OSH Standard

The Organization for Standardization (ISO) has announced the release date for the global occupational safety and health management standard it's been working on for five years. ISO 45001 will be available starting March 12, 2018.

Top 10 Implementation Pitfalls of a Safety Observation Program

Incorporating an observation program into an organization is necessary when trying to evolve to an interdependent safety culture. However, there are several pitfalls an organization can fall into that can lead to disaster.

CSB on the Budget Chopping Block

The U.S. Chemical Safety Board (CSB) is one of the federal agencies slated for elimination under the 2019 budget proposal. The cuts are part of an effort to slash the federal deficit by $3 trillion over the next 10 years.

Could Self-Driving Trucks Make Roads Safer?

With distracted driving accidents on the rise, some safety professionals are now beginning to ask, could autonomous vehicles be one of the keys to making roadways safer?

Drowsy Driving a Bigger Problem than Previously Thought

The percentage of crashes involving drowsiness is nearly 8 times higher than federal estimates indicate. Analysis of in-vehicle dashcam video from more than 700 crashes confirmed that the danger of drowsy driving goes well beyond the federal estimates of drowsiness being a factor in crashes.

Free Wellness Program Available for Small-business Employees in Ohio's High-risk Industries

Ohio workers in high-risk industries now have access to free health and wellness resources and services through a new program funded by the Ohio Bureau of Workers' Compensation. The program provides workers with resources to "take ownership" of their health and well-being.

Minimum Wage Increase Leads to Reductions in Illness-related Absences

In the world's largest running household study of its kind, health economists have found that a $1 increase in the minimum wage translated into as much as a six-hour reduction in absenteeism per worker per year.

Occupational Health Research Round-up: February 2018

This month's crop of occupational health research papers includes reluctance to take sick leave, chemical-induced hearing loss, long hours impacting film industry health, and investing in health of shift workers.

Upcoming Conferences

  • PAAOHN, March 7-9, 2018
  • CSOEMA, March 8-10, 2018
  • NCAOHN, March 21-23, 2018
  • AAOHN, April 16-18, 2018. Visit Us in Booth #419.
  • AOHC, April 29-May 2, 2018
  • ASSE Safety 2018, June 3-5, 2018
  • MAOHN, Nov. 1-2, 2018
  • More to come; Stay tuned...

Job Openings

Occupational Health Triage Call Center Lead Nurse (Night Shift Preferred)

CHR is seeking an experienced Occupational Health Registered Nurse to help establish and lead a telephone triage call center. For further information, please contact

WBENC-Certified Women's Business Enterprise

Email Rhett Suhre for More Information.

CHR is Celebrating 31 Years!

CHR is a TRAC-Certified Vendor
Learn more about TRAC

Health and Safety Works, LLC

Health and Safety Works, LLC provides training, consulting, and research services in support of Occupational Health (OSHA), Transportation Health (FMCSA) and Health and Wellness. Read more about Health and Safety Works or email HSW Founder and CEO, Elaine M. Papp RN, MSN, CM, COHN-S FAAOHN.