He received his PhD in 1981 in medical- and physiological chemistry[1] at Lund University.

[3] Since 1981 his research aims to study mechanisms of brain injury and repair and to find new stroke therapies[4][5][6] This research is conducted at the Wallenberg Neuroscience Center[7] at Skåne University Hospital and Biomedical Center (BMC) [sv][8] in Lund.

[9][10] Tadeusz Wieloch is a corresponding member of the Polish Academy of Sciences[11] since 2005[12] and chaired the Brain Foundation's Scientific Committee[13] from 2008 to 2014.

[14] He holds several patents and has founded three companies[15] e.g. Sinntaxis AB[16] in 2017.

He did his military service in the Swedish Armed Forces Language School [sv] and was an interpreter on the Russian submarine U137/S-363 during November 4–6, 1981, after the submarine ran aground in the Blekinge archipelago.