Christiane Renate Timmel is a German chemist who is Director of the Centre for Advanced Electron Spin Resonance at the University of Oxford.

[5] After graduating, Timmel was awarded a Royal Society University Research Fellowship at St Hilda's College, Oxford.

In the radical pair mechanism, Timmel has shown that the relative orientation of molecules with respect to an applied magnetic field can impact the reaction kinetics.

In an effort to understand bird migration, Timmel has investigated the magnetic field responses of various proteins, including those in the photolyase and the blue-sensitive cryptochrome families.

[7] Alongside her own research, Timmel directs the Centre for Advanced Electron Spin Resonance (CAESR) at the University of Oxford, which she founded in 2007.