Like any occupation, it's a long story, and I'm happy to share more details over DM. But basically due to indecision over my major I took an abnormal amount of math, stats, and environmental science coursework even through my major was in social science, and I just kind of leaned further and further into that quirk as I transitioned into the workforce. bear in mind that data science as a field of study didn't really exist yet when I graduated; these days I'm not sure such an unconventional path is necessary. however I still hear from a lot of junior data scientists in industry who are miserable because they haven't figured out yet that in addition to their technical skills they need a "vertical" niche or topic area of interest (and by the way a public service dimension also does a lot to help a job feel meaningful and worthwhile even on the inevitable rough day here and there).