As Griffin says, it's a global game. But it's also an increasingly T20 dominated one.

The signing of Griffin, whose experience extends across England and New Zealand, is the first foreign T20 specialist coaching signing in WBBL history and speaks volumes of the competition's growing significance within the global T20 arena.

With two Kia T20 titles (English and Welsh league) behind his back, Griffin will have large shoes to fill in replacing Joanne Broadbent but seems to have the pedigree to take on the WBBL's biggest supported club.

"It's a global game now. We're seeing more female Twenty20 competitions," Griffin told AAP.

"There's a real passion for franchise teams to ensure they have their best people in the right place to help them

"Modern day now the ability to travel and being able to work from overseas with Skype makes it a lot easier to start some of the work prior to landing."

Griffin's appointment also came with the announcement that 'promising' teenager Kate Peterson had been added to the Thunder's squad.

"The challenges (coaching in the two countries) are very similar," Griffin said.

"The biggest challenge is just the different surfaces. The pitches (in England) are a bit slower and lower, whereas in Australia they are quicker and bouncer.

"Over here it's about dealing with pace off, in Australia you're dealing with bowlers being able to send down bumpers."