Occupational Health Services at Dreyer Medical Clinic date back at least to the Depression. As the first group of doctors in the area, during a time of explosive growth in the manufacturing industries, the Clinic was in the prime position of being the only medical facility in town which always had a doctor available for industrial accident cases.

According to Dr. Harry Greeley, in a history book he wrote about Dreyer Medical Clinic, nearly 99% of all the Aurora companies used Dreyer to treat their workforces. In addition, most required pre-employment exams, and these too were performed by Clinic doctors. Even though large plants such as Caterpillar and Western Electric eventually hired their own medical doctors, they continued to use Dreyer's Occupational Health Services for many services.

In 1943, a registered nurse, Ray Cantrall, was hired by the Clinic to help take care of the patients using the Industrial Department, as it was called at the time. Although he always had the backup care of several doctors, over the years, Ray developed into one of the most capable people in the area for first aid.

Dr. Edwin Hausmann and Dr. John Landes, the 8th and 16th physicians, respectively, to be hired by Dreyer, played an instrumental role in the development of a comprehensive occupational medicine program at Dreyer. They first sought and then maintained company contacts, and ironed out any problems that arose between physicians, insurance companies, and the businesses.

Occupational services were first offered from Clinic offices in the Graham Building on Stolp Island in downtown Aurora. They moved, along with the entire Clinic operation, to the new West Aurora facility on West Galena Boulevard when it was opened in 1964. In 1985, Occupational Health Services moved from the lower level of the West Aurora site to its current location adjacent to Walk-In Care on the north side of the first floor.

In the 1980s, Occupational Health Services were expanded and also made available from the Clinic's new satellite site, Fox Valley Villages, near the shopping center on the far east side of Aurora. In 1998, a third location for occupational medicine was opened at the Batavia facility on Fabyan Parkway, just west of the historic Campana Building.

Today, business leaders can still choose the same great care for their employees that companies throughout the Fox Valley have relied on since the 1920s. The safety and productivity of a company's workforce are the keys to an organization's success, and nobody knows that better than the experienced occupational medicine professionals at Dreyer Medical Clinic today.