Rumtin is a researcher focused on the policy of existential and global catastrophic risk. He is currently leading a project on building the capability of the existential and global catastrophic risk research community, funded by the Survival and Flourishing Fund. He is also a Board Member of Australia-based Commission for the Human Future. Previously, he worked as a Policy Officer in the Department of the Prime Minister and Cabinet of Australia, and as an Intelligence Analyst with the Department of Defence.