Headquartered in Piscataway, New Jersey, Siemens Hearing Instruments designs, engineers, and manufactures state-of-the-art hearing aids, in all custom (ITE, ITC and CIC) and BTE models. These enable those with hearing loss to communicate more easily and improve their quality of life. It is the largest manufacturer of hearing aids in the United States.

Siemens offers audiological software and a wide variety of equipment for Hearing Care Professionals, as well as assistive listening devices such as amplified telephones.

The company operates as a subsidiary of Siemens Medical Solutions, a division of Siemens AG, Munich, Germany, a leader in the fields of communications, automation & transportation, electronic components, energy power, lighting, as well as medical electronics. The world's 7th largest employer with 460,000 employees, Siemens is located in 193 countries spanning six continents. Siemens spends over $5.1 billion on research and development annually, ranking it third in R&D investment of all major international corporations.