“Guesty’s departure gave us an opportunity to look at how we could move forward from a position of strength, having put together such a strong record over the past two summers,” The Blaze’s director of cricket James Cutt told the club website.
“We conducted an exhaustive, global search to find the best candidate, and – amongst some very strong applicants – Craig’s credentials and pedigree were the most compelling.
The Blaze are among eight fully professional, county-based teams who will compete in the T20 Blast and One-Day Cup in 2025 as part of a restructure of the women’s domestic game.
Cumming takes over as head coach of a side that reached three of the last four domestic finals under the previous regional format, and won the Charlotte Edwards Cup earlier this year.
“I’m ambitious to help deliver more of the success they have had in the past couple of seasons,” he added.