Biologically, super-soldier. Temperamentally and professionally, biology researcher. Recreationally, chemist.

"Psychedelics are to the study of the mind, what the microscope is to biology and the telescope is to astronomy."
– David E. Nichols
“LSD is a catalyst or amplifier of mental processes. If properly used it could become something like the microscope or telescope of psychiatry.”
― Stanislav Grof