I wouldn't say impossible, but definitely very hard without high-level fluency in English and a solid cybersecurity background. Out of the eight of us in Argentina, only one hadn't lived in an anglophone country before, but even that one exception has parents living in Ireland. Everyone else had lived and/or worked in the US or Canada for a few years, and the team lead was a Canadian who has been here for 15 years.
When we all had to do our mandatory English exams to see if we needed extra training, the one with the worst English on the team had a solid B2 spoken and C2 written level.
