Brenda Boultwood

"By nature I'm very high-energy," says Brenda Boultwood, Constellation Energy's recently appointed chief risk officer. In her formative years she could be found smashing serves on the tennis court and playing her way round the golf course. Today she runs the occasional half-marathon and oversees the risk management programme at the largest wholesale power retailer in the US. "I love a high-paced, active role," she says.

There's no doubt that her role as CRO, which she started in January, will be