Alexander Choukér attended medical school at the Ludwig-Maximilians-University (LMU) in Munich, Germany. He completed clinical and some scientific training at the LMU and worked as a Fogarty award researcher at the National Institutes of Allergy and Infectious Diseases (NIAID) at the NIH in Bethesda, MD, USA.

Currently he is based in the department of Anesthesiology at the LMU. In a joint endeavor with his team several experimental, clinical and space flight related studies in the field of stress-associated immune consequences have been conducted. His research focuses especially on an inter- and cross-disciplinary approach for the fundamental understanding of adaptation as well as minimal to non-invasive health monitoring of humans exposed to extreme environments, all with the goal of mitigating health risks, in space crew as well as in patients.

He has been chairman and an active member of several advisory boards, including space and non-space boards within ESA and other European organizations.