Background: In many countries, availability of basic training and continued professional development programmes in wheelchair services is limited. Therefore, many health professionals lack access to formal training opportunities and new approaches to improve wheelchair service provision. To address this need, the World Health Organization (WHO) developed the WHO Wheelchair Service Training of Trainers Programme (WSTPt), aiming to increase the number of trainers who are well prepared to deliver the WHO Wheelchair Service Training Packages. Despite these efforts, there was no recognised method to prepare trainers to facilitate these training programmes in a standardised manner. Objectives: To understand if the WSTPt is an effective mechanism to train aspiring wheelchair service provision trainers. Method: An action research study was conducted using a mixed-methods approach to data collection and analysis to integrate feedback from questionnaires and focus groups from three WHO WSTPt pilots. Results: Trainees were satisfied with the WHO WSTPt and the iterative process appears to have helped to improve each subsequent pilot and the final training package. Conclusion: The WHO WSTPt is an effective mechanism to train wheelchair service provision trainers. This programme has potential to increase the number of trainees and may increase the number of qualified service providers.