He subsequently worked as Research Staff with Leo Neuringer and Robert G. Griffin at the Massachusetts Institute of Technology and then in 1980 he moved to the ETH in Zurich, where he joined the group of Richard R. Ernst.

[5] In 1996 he was elected fellow of the American Physical Society "for his numerous contributions toward making magnetic resonance one of the most sophisticated and versatile methods available for gaining insight into structure and dynamics of molecules in condensed and gas phase.

[12][13] This double INEPT has been the base for many subsequent heteronuclear correlation experiments published in the literature[14] and it has proven pivotal in the spectroscopy of organic chemistry and in the field of protein NMR.

[15] In 1984 he published with Herbert Kogler and Richard R. Ernst a pivotal article in the Journal of Magnetic Resonance where they described how to design phase cycles allowing the selection of specific coherence-transfer pathways in NMR pulse experiments.

[16] In 1987 he published with Richard R. Ernst and Alexander Wokaun Principles of Nuclear Magnetic Resonance in One and Two Dimensions, considered a classical monograph on the topic of multidimensional NMR.