I have worked in a research institute (R&D for a parent company) for 10 years after my postdoc. I used to teach occasionally as an adjunct professor. Despite our R&D theme, I have an excellent record of publication (comparable with my peers in terms of quality and quantity; unquestionably good). However, I never applied for external funding, as our research fund was directly provided by the institute.
I applied for some faculty positions but unsuccessful. They didn't give me a detailed feedback but mentioned that a criterion for the job is "demonstrated success in securing external funding".
Should I give up? Because this is something I cannot do anything about it. Unless I assume a faculty position I cannot send research proposals for external funding. And if this is a mandatory condition, I can never assume a faculty position.
I understand that external funding is important for universities, but I wasn't unsuccessful, just didn't need to apply because of my job. I understand that proposal writing might be different but my successful research shows that I can write winning proposals too. I have conducted all my research projects based on initial proposals, but they were internal.