Kasia Owczarczyk is a Consultant in Clinical Oncology specialising in gastro-oesophageal, rectal and hepatobiliary cancers. She currently works as a consultant in Guy's and St Thomas' NHS Foundation Trust.

She trained in clinical oncology at University College Hospital London and Mount Vernon Cancer Centre. She has completed a research MD, a post-doctoral fellowship at Genentech, South San Francisco, and a clinical fellowship in cancer imaging at King's College London.

She was appointed as an honorary senior clinical lecturer at King's College London in 2018 and awarded the Guy's Cancer Career Development and Innovation Award in 2019. Her research includes publications in the Science TM, JCI Insights, and Radiotherapy Oncology journals.

Kasia's interests include: Chemoradiotherapy and radiotherapy treatment of gastro-oesophageal & rectal cancers, chemoradiotherapy treatment of pancreatic cancer, stereotactic body radiotherapy (SBRT) including MRI guided SBRT, intraluminal HDR brachytherapy of oesophageal cancer; predictive markers; radionics