In 2020, I was one of the organizers of Semana da Engenharia Matemática e Matemática Aplicada (Week of Applied Mathematics and Mathematical Engineering), SEM²Ap.
The event was online, and the events were mainly in portuguese, but there were also talks in english. Below are some links where you can find more about it:
In 2019, I co-organized a weekly student seminar at UFRJ, named 'Encontros Matemáticos'.
The main objetive of the project is to promote a stronger integration between students at UFRJ's Mathematics Institute.