He completed his undergraduate degree in
St. Peter's College and his PhD degree in
Magdalen College, Oxford. He subsequently continued his career in
Warsaw (2012),
Bonn (2012–2015), and
Bielefeld (2015–2020) before returning to Oxford where he joined the university's Mathematical Institute. He is a member of the
London Mathematical Society and the
European Mathematical Society. In 2022, he was awarded the
Whitehead Prize of the
London Mathematical Society for "his striking, original and fundamental contributions to the fields of
geometric group theory and
low-dimensional topology, and in particular for his work on
automorphism groups of
discrete groups and fibrings of manifolds and groups". In 2023, he became the co-recipient of the Frontiers of Science Award together with Marek Kaluba (
Karlsruhe Institute of Technology) and Piotr W. Nowak (
Polish Academy of Sciences) for their research in the field of
algebraic and
geometric topology. The award was presented at the inaugural International Congress of Basic Science (ICBS) in
Beijing. In September 2023 Kielak was awarded a
Title of Distinction of Professor of Pure Mathematics by the University of Oxford. ==Selected publications==