With the help of thousands of schoolchildren in Balikpapan contributing small amounts of money, Smits was able to set up what became the Borneo Orangutan Survival Foundation to rehabilitate orphaned and misused orangutans and return them to a safe place in the wild.
The Dutch orangutan-scientist Herman Rijksen recalls Smits creating the facility: "In no time he set up the most fantastic oversized quarantine facility, better than any hospital in the whole area, because that's typical of Willie.