GP Dr Lisa Searle’s life is one of extremes — from providing medical care in war-torn countries to chaining herself to bulldozers in old-growth forests.

In fact, she had barely unpacked from her recent posting in Sudan before she headed back to her “frontline direct-action work” with the Bob Brown Foundation to slow logging in Tasmanian forests.

“I bounce back and forth between these two very intense worlds, and I don’t waste a lot of time in between,” Dr Searle tells 6minutes.

Her 15 years with MSF have taken her across the world’s trouble spots, including Pakistan, Haiti, the Central African Republic, Ethiopia and Ukraine.