The IEEE SMC 11th Workshop on Brain-Machine Interface (BMI) Systems will be held virtually from October 17-20 as part of SMC 2021, the flagship annual conference of the IEEE Systems, Man, and Cybernetics Society. The goal of the Workshop is to provide a forum for scientists to present research results, facilitate the interaction and intellectual exchange between researchers, developers and consumers of BMI technology. We invite contributions reporting the latest advances, innovations and applications in BMIs. The BMI Workshop is organized by the IEEE SMC Technical Committee on Brain-Machine Interface Systems. Participation is free to all registered SMC 2021 attendees. Visit the full BMI workshop website here. CFP for the workshop can be found here.