Prior to joining Ridgeline in 2017, he spent 17 years at Roche as Medicinal Chemist where he was leading research and early development projects and leading international collaborations. He has created 7 clinical candidates maturing through all development phases.

Alexander has authored over 50 patent applications and 41 scientific articles and invited conference presentations. He graduated with a degree in chemistry from University Bonn, received a Ph.D. from the University of Karlsruhe, and completed postdoctoral fellowships at the Scripps Research Institute and the ETH Zurich.