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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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(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


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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 - July 26, 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 truly love working with CHR and the level of expertise you give to us for support."

Adults Need Immunizations, Too

Although most people would associate immunizations with babies and children, it's still a good idea for adults to get shots for such things as pneumonia, shingles and tetanus.

Why That "Clean Swimming Pool" Smell Is Actually Really, Really Bad News

It's recently been reported that scientists have managed to create a test to measure how much urine is in a swimming pool. It seems that peeing in the pool has become commonplace, even among high-profile swimmers.

Adequate Emergency Nurse Staffing Needed to Reduce Fatigue

Safe and appropriate staffing levels in emergency rooms can help reduce fatigue among nurses, the Emergency Nurses Association asserts in a recent draft position statement.

American Workers Need Better Safeguards from Extreme Heat

All sorts of federal safeguards protect the health of American workers. However, there is no specific standard for working in dangerously hot environments - even though about 2 in 1,000 workers are at risk for heat-related illnesses.

Poor Air Quality Does Not Offset Exercise's Heart Benefits

Even in areas with moderate-to-high levels of traffic pollution, regular physical activity reduced the risk of first and recurrent heart attack, according to new research in Journal of the American Heart Association.

Ohio Closer to Prohibiting Mandatory Overtime for Nurses

Legislation that would prohibit Ohio nurses from working mandatory overtime was approved by the state House on June 7. The bill does not prevent nurses from working voluntary overtime and makes exceptions for overtime during natural disasters and other unforeseen events.

PTSD Rate Among Prison Employees Equals that of War Veterans

Prison employees experience PTSD on par with Iraq and Afghanistan war veterans, a new study from a Washington State University College of Nursing researcher found.

Mariners at Sea Get Health Help Through Telemedicine

A study funded by NIOSH and conducted at the Yale University School of Medicine provides a fascinating glimpse into the challenges of providing health care to workers who are nowhere near health care facilities.

Vehicle Vibrations May Make Drivers Drowsy

You're driving on a country road, when you suddenly find yourself getting very, very sleepy. One potential culprit? Vibrations, according to a recent study from RMIT University.

ISO Updates Information Security Standard

ISO/IEC works complementary to ISO/IEC 27001:2013 to provide the requirements for an information security management system. The standard provides organizations with guidance on navigating information security risks.

Occupational Health Research Round-up: July 2018

Stories include cardiovascular disease and night work, uninterrupted sitting at work, leisure time with colleagues, radiographers and work-related illness, and occupational carcinogens on the rise.

Upcoming Conferences

  • GAOHN, Sep. 6-8, 2018
  • IAOHN, Sep. 14, 2018
  • MAOHN, Nov. 1-2, 2018
  • OAOHN, Nov. 1-3, 2018
  • NECOEM/MaAOHN, Nov. 29-30, 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.