Zen Master Bon Shim (Aleksandra Porter) is the Regional Zen Master for the Kwan Um School of Zen in Europe. She began practicing with Zen Master Seung Sahn in 1978 and was given Inka, or permission to teach, in 1992. She received transmission in 2006. Today she serves as the guiding teacher of the Barcelona sangha and serves as co-guiding teacher of the Cambridge Zen Center when she is in residence.
You can find her retreat schedule at
https://www.kwanumeurope.org/Sit, Breathe, Bow is hosted by Ian White Maher
https://www.theseekerstable.com/Sit, Breathe, Bow is sponsored by the Online Sangha of the International Kwan Um School of Zen
https://kwanumzenonline.org