David got his Ph.D. 1996 in the group of Herman Berendsen, one of the pioneers in the field of molecular simulations. During and after his Ph.D. work he was one of the main developer of the GROMACS MD software, which is now used by thousands of researchers.
After moving to Uppsala University, Sweden he worked on a number of topics, including proteins in the gas phase, interaction of biomolecules with X-rays and simulations of liquids.

Over the last 15 years his focus is developing force fields for molecular simulation from scratch.