CHA Occupational Health

CHA Occupational Health helps hundreds of local businesses keep their employees safe, healthy and productive. We prevent and treat workplace injuries, help you meet regulatory requirements and foster a workplace where employees can thrive.

Our goal is to balance your business needs with your employees' needs, for a partnership that works for everyone.

Occupational Health at its Best

A World-Class Team: Our program is staffed by physicians on the faculty of Harvard Medical School and the T.H. Chan Harvard School of Public Health, many of whom are internationally known. We’re at the forefront of clinical best practices as we train the next generation of Occupational Health physicians through our Harvard residency program.

Broad Expertise: We work with clients across a range of industries, including biotech, healthcare, life sciences, manufacturing, municipal, pharmaceuticals, public safety, retail and transportation. This helps us address the needs of all employees, from drivers to researchers, office workers to police officers.

Convenience: Our CHA Assembly Square Care Center is close to major roadways and public transportation, with a short walk to the Orange Line. Ample parking is available, including parking for large vehicles.

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 create an environment of employee well-being and engagement.

Clinical Services

  • 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 – Ergonomics and More
  • Travel Medicine
  • Vaccinations and Titers
  • Workplace Injuries -- Urgent Care and Treatment (including chemical and toxic exposures)
  • X-rays

Specialized Industry Services

  • Clinical Supervision for on-site Employee Health services
  • Consultation services
  • Evaluations for chemical and bio-hazard exposures
  • Preventative program development for Vivarium and research staff
  • Support for IBC's (Institutional Biosafety Committees) 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

Meet Our Chief

Dr. KalesOur Chief of Occupational and Environmental Medicine is Stefanos N. Kales, MD, MPH, FACP, FACOEM. Dr. Kales has published over 100 articles and has participated in research, advisory and teaching activities on five continents. Dr. Kales 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.

Find a Provider

    Contact Us

  • Occupational Health Program

    CHA Assembly Square Care Center 5 Middlesex Ave. | 1st Fl. Somerville, MA 02145
    P: (617) 591-4660 F: (617) 591-4693

    M - F: 8:30 am - 5 pm


  • Stephen Kales presented with award at the Fire, Rescue International Conference in San Antonio, Texas

    Chief Todd LeDuc (left) and Richard Miller of the International Association of Fire Chiefs (right) presenting Stephen Kales, MD, MPH, FACP, FACOEM (middle), with an award last week at the Fire, Rescue International Conference in San Antonio, Texas. The award was given in recognition of his research to improve firefighters’ well-being.