Professor Jansen studies plant molecular systematics and evolution with a primary focus on comparative genomics of plastids, their utility for understanding genome evolution and phylogenetic relationships of angiosperms, and coevolution between plastid, mitochondrial and nuclear genomes. Dr. Jansen serves on the editorial board of several journals, including BMC Evolutionary Biology, Journal of Plant Biology, Plant Systematics and Evolution. He is also a member of the Scientific Advisory Board of Seacology, the Advisory Committee of Biodiversity Research Center, Academia Sinica, Taiwan, and a Distinguished Adjunct Professor Professor at King Abdulaziz University in Jeddah, Saudi Arabia.