This is surprising to hear. I have a similar background, albeit my GPA was not quite as good and I terminated by mathematics education with a master's. I work with lots of PhDs that have transitioned from other STEM fields.
Are you good at math competitions? Competitive programming is basically the same thing. This is how I transitioned in the field. If you can do these, interviews will be a breeze.
Are you good at math competitions? Competitive programming is basically the same thing. This is how I transitioned in the field. If you can do these, interviews will be a breeze.