The biggest threat to the apes is destruction of their environment by man, with huge areas of rainforest cleared for palm oil and other plantations. The species' plight first came to Boston's attention when she was working as a primate keeper at Auckland Zoo, where she was involved in the zoo's anti-palm oil campaign in the 2000s.
"There was a lot of press coverage about palm oil at the time and a lot of products which contain it were identified, which caused a bit of a backlash. We started up a consumer awareness campaign and created a palm-oil-free shopping guide," Boston says.
"The main reason orangutans are endangered is because of this forest being destroyed - and it's going on every single day. We wanted to highlight that people can slow the demand for palm oil by being careful with what they buy."
Boston's "day job" is as pet advisor for Bombay Petfoods, which produces the Jimbo's brand, and says her employers are supportive of her desire to work with endangered species.
"We're very limited in New Zealand when to comes to working with animals. After working as a vet nurse and at the zoo, I wanted to go overseas and do some work at a wolf sanctuary. I decided I needed to find a job here that could support that kind of work, where I could go off every couple of years and do something like this."
Boston says while the orangutan work is not as relevant to her job as her time with the wolves, it is still in keeping with Jimbo's animal-based philosophy and the company's stance against palm oil.
After a stint doing volunteer work with elephants in Thailand, Boston got in touch with the Sepilok sanctuary in 2012 in the hope of an opening becoming available. She jumped at the chance of the two-and-a-half-month stay, even though the centre is isolated and she expects facilities will be basic.
There will also be only a small team of around 10 volunteers, which she hopes will become "tight knit" through their experiences.
"I'm looking forward to spending some quality time away from the rat race, living very simply and immersing myself in the environment," Boston says.
She is also looking forward to positive feedback from her "clients": "I love orangutans because they are very much like people. With a lot of the work you do with animals, they don't really thank you themselves...Primates and especially the great apes are so different - they really connect with you and share their appreciation for what you are doing."