05/2025-present Chair Professor,  Tsinghua Shenzhen International Graduate School (Tsinghua SIGS)

02/2023 Retired from Harvard

2017-2023 Joshua and Beth Friedman University Professor, Harvard University

2015-2020 Chair, Department of Chemistry and Chemical Biology, Harvard University

1999-2017 Mark Hyman Professor of Chemistry, Harvard University

1991-1999 Professor of Chemistry, Harvard University

1990-1991 Associate Professor of Chemistry, Columbia University

1987-1990 Assistant Professor of Chemistry, Columbia University

1985-1987 Postdoctoral Research, California Institute of Technology