Takuma Haga
- Oct. 2021–present: Senior Curator / Principal Researcher, Division of Paleoenvironment and Paleoecology, Department of Geology and Paleontology, National Museum of Nature and Science, Tsukuba
- Apr. 2017–Sep. 2021: Curator, Division of Paleoenvironment and Paleoecology, Department of Geology and Paleontology, National Museum of Nature and Science, Tsukuba
- Apr. 2015–Mar. 2017: Curator, Toyohashi Museum of Natural History, Toyohashi, Aichi
- Apr. 2014–Mar. 2015: Part-time Researcher, Department of Geology and Paleontology, National Museum of Nature and Science, Tsukuba
- Apr. 2011–Mar. 2015: Part-time Lecturer, Department of Mathematics and Science, School of Science and Engineering, Kokushikan University
- Apr. 2011–Mar. 2014: JSPS Postdoctoral Fellow, Japan Agency for Marine-Earth Science and Technology, Yokosuka
- Oct. 2010–Mar. 2011: Technical Assistant, Department of Geology and Paleontology, National Museum of Nature and Science, Tsukuba
- Apr. 2007–Mar. 2010: JSPS Research Fellow (DC1), The University of Tokyo