Ashton's practice focuses primarily on advising clients within the energy industry on a diverse range of transactional, corporate and commercial matters. She has experience assisting clients with mergers and acquisitions, project development, joint ventures, complex commercial arrangement and cross-border transactions. Ashton advises strategic clients and private equity investors, with a particular emphasis on all aspects of the energy value chain, including upstream oil and gas, pipelines, midstream, downstream and marketing, power and renewables, and carbon capture, storage and utilization.
In 2017, Ashton received the Horace Harvey Gold Medal for achieving the highest standing in her graduating class. In 2018–2019, Ashton worked as a law clerk at the Supreme Court of Canada for the Honourable Justice Russell Brown. In 2017–2018, Ashton completed articles of clerkship at the Court of Appeal of Alberta, where she articled to the Honourable Justice Brian K. O'Ferrall.