CHA Occupational Health

For your health, your company
and your community

Contact Us

617-591-4660

Hours

Monday - Friday 8:30 am - 5 pm

"CHA has been a wonderful partner...responsive, timely and professional. They integrate into our work culture, are well accepted by our employees and are an excellent resource for managing our employee care. The partnership and prevention work done by CHA has significantly increased our knowledge and awareness, resulting in fewer lost time cases and injuries."

- from a Boston-area HR executive

"Firefighting as a profession can be a difficult job and takes a toll on a person's body. After doing extensive research on firefighter health, you stood out to me with your expertise and dedication...I cannot thank your team enough for allowing me to come out to the Boston area for the evaluation and guidance on my medical conditions and work as a firefighter."

- from an experienced Fire Chief

"The healthcare professionals possess in-depth knowledge and expertise in this demanding field. Each interaction with CHA is managed with care, keeping client privacy a priority. CHA is critical to our successful compliance program ensuring faculty, students, and staff are safe."

- From a local Biotech Compliance Manager

CHA Occupational Health offers expertise and direct care to individuals and organizations in the Boston region. We provide regulatory exams, prevent and treat workplace injuries, protect the health of travelers, and help hundreds of businesses keep employees safe, healthy and productive.

What You Get at CHA

Broad Expertise: We work with clients in biotech, healthcare, life sciences, manufacturing, municipalities, pharmaceuticals, public safety, retail and transportation. This gives us experience across all sectors of the workforce - drivers, researchers, executives, office workers, police officers and tradesmen.
On- and Off-site Services: CHA provides both remote and on-site services for clients. This includes clinical care and staffing of Medical Directors, Occupational Health Nurses and Ergonomists.
Employee Wellness: Whether you have an established Wellness Program or hope to start one, we can help. Choose a customized approach or prepackaged services to support your employee health goals and foster employee well-being and engagement.
Convenience: Our center is close to major roadways and public transportation (Orange Line). Ample parking is available, including parking for large vehicles.

A World Class Team

CHA physicians are on the faculty of Harvard Medical School and T.H. Chan Harvard School of Public Health, offering you years of clinical and research experience.

We are also home to the Harvard Occupational Health Residency program.

Meet Dr. Stefanos Kales, recipient of the 2024 Excellence in Mentoring Award from the American College of Occupational and Environmental Medicine. Learn more about Dr. Kales and his research.

Article: Firefighting and the Heart

Research on the risks of daytime sleepiness in drivers

CHA Firefighter Health Symposium in Orlando

Video: International Association of Fire Fighters (IAFF) Conference

Services We Offer

Agency Regulated Exams: OSHA, DOT, IME, FCE
Annual Medical Services
Disability Management
Immigration Exams
Medical Clinics, Flu Clinics and More
Orthopedic Consultations
Physical and Occupational Therapy
Pre-Employment Services and Exams
Screenings
Specialty Exams, Ergonomic Assessments and More
Travel Medicine
Vaccinations and Titers
Workplace Injuries - Urgent Care and Treatment (including chemical and toxic exposures)
X-rays

Conditions We Treat

Clinical supervision for on-site Employee Health services
Consultation services
Evaluations for chemical and bio-hazard exposures
Program development for Vivarium and research staff
Support for Institutional Biosafety Committees (IBCs) and attendance at meetings
Development of pre-hire medical surveillance screening programs for employees and on-site vendors
Collaboration with Environmental Health and Safety agencies
Disability Management interface with managers and supervisors to facilitate appropriate return to work for work/non-work related cases

Where You Can Find Us

CHA Assembly Square Care Center

5 Middlesex Avenue
Somerville, MA 02145

617-591-6840

View Details Get Directions

Our Leadership Team

Dr. Stefanos Kales Stefanos Kales, MD, MPH, FACP, FACOEM - Medical Director

Our Chief of Occupational and Environmental Medicine, Dr. Stefanos Kales, has published over 100 articles and has participated in research, advisory and teaching activities on five continents.

He has a particular interest in the health of firefighters and other public safety professionals. His work includes research on the clinical epidemiology of cardiovascular events in firefighters and determining the causal relationship between heart disease and job activities. He currently serves as a Professor of Medicine and a Professor of Environmental Health at Harvard. Learn more.

Portrait of Dr. Russel Tontz Russell Tontz, MD - Associate Medical Director

Dr. Russell Tontz is a skilled physician who is board-certified in Occupational Medicine, Aerospace Medicine and Family Medicine. He comes to us from the Mayo Clinic, where he served as director/chair for Occupational Medicine and Employee Health in Minnesota for five years.

An Air Force Veteran, Dr. Tontz has specialized training in Bioterrorism Prevention and Response and FEMA response. His extensive field and tactical knowledge includes 15 years experience caring for Fire and Law Enforcement and managing complex return to work and WC injuries. He is currently on the faculty at Harvard Medical School and brings a unique perspective to our team.