She wanted to put herself through college by working at Saturn, but she ended up finding that she loved the cars more than what she was studying, so when General Motors announced the EV1 electric vehicle program three years later, she jumped on it.

Sexton was laid off from General Motors at the end of 2001, after the company stopped manufacturing its EV1 electric automobile.

Sexton became a consultant to auto manufacturers and clean-energy providers, helping to bring alternative-fuel vehicles to market, and promoting increasingly "clean" (i.e., air pollution-free) ways to power them.

[5][6][7] In 2011, Sexton published a review of the Yokohama HER-02 EV sports concept car, for Wired magazine.

Since September 2019, Sexton has been a presenter on the (YouTube) show Fully Charged, covering stories in America as part of the (UK-based) channel's drive to use local reporters as much as possible, thus reducing 'journalism miles'.