In her words:
"I am an analytical chemist with a background in forensics and toxicology. Before working full-time as a science writer and public speaker, I worked as a chemistry professor, a toxicology chemist, and in research analyzing pesticides for safety".
Translation: she works for pesticide companies proving their products are safe and quietly took these words of her website roughly around the time the WHO said organophosphate pesticides "probably" are a source of human cancers.