We surveyed physician supervisors of provisionally licensed International Medical Graduates (IMGs) in British Columbia, Canada, to assess their faculty or professional development and support needs; the results of which would better inform a Faculty Development Program for supervisors and add to the body of literature. A mixed-method approach (online and paper-based) was employed in our survey research. We mailed a paper-based version of the survey to supervisors and included a link to the online version of the survey. A reminder email with an online link was sent by the provincial medical regulatory authority to supervisors, encouraging their participation. Of 68 completed survey responses, two-thirds (63%) were completed on paper, and one-third (37%) were completed online. The combined online and paper-based approaches were found to have a positive influence on response rates, with the strengths of each respective method reducing the limitations of the other. Researchers need to compare the strengths and limitations of each option and implement strategies to maximize the response rates of physicians to needs assessment surveys.