OHIP began in 2004 with support from NIOSH to the Association of Occupational and Environmental Clinics (AOEC). In 2008, AOEC received a three-year NIOSH Training Program Grant (TPG) for OHIP. This is the only training grant from NIOSH specifically designed to recruit occupational health professionals through a summer internship experience.

In addition to core support from the NIOSH TPG, substantial support has been provided by The California Wellness Foundation (TCWF). Beginning in 2007, TCWF has supported training and leadership development for both summer and year-round OHIP interns in California who have worked with a wide variety of community-based and labor organizations.

Many other organizations have provided crucial financial support to OHIP including: