I use organic geochemistry as a tool to understand how the Earth system responds to climate change. Molecular fossils (biomarkers) are ubiquitous in sedimentary deposits and can often be applied in both marine and terrestrial environments, making them useful proxies for reconstructing environmental change. As an organic geochemist I collaborate with researchers in a number of different fields to generate multiproxy climate records. I also work with bioscientists to understand how/why organisms produce biomarkers and how those biomarkers relate to modern environmental parameters.