Aleksandra Zalewska received her Doctor of Veterinary Medicine degree from the Warsaw Agricultural University, Poland, in 2007.

Following her graduation, she was employed as a veterinary pathologist at Sequani Limited, a contract research organization located in Ledbury, United Kingdom. During this period, she completed the board examinations in Toxicology, subspecialty Pathology, and was subsequently elected a Fellow of the Royal College of Pathologists.

She then joined Idorsia Pharmaceuticals in Allschwil, Switzerland, where she held the position of pathologist and project toxicologist.

In 2023, she joined Novartis AG in Basel, Switzerland, where she currently serves as a pathologist and project toxicologist. In 2024, she became a Diplomate of the American Board of Toxicology.

Since August 2026, she has been pursuing a PhD at Novartis under the academic supervision of Prof. Alex Odermatt. Her doctoral project is entitled “Mechanistic Insights into Glucocorticosteroids Signaling and Inflammaging: From Molecular Pathways to Translational Therapeutics”.