清华大学

数学系, 教授, 2011-06至现在

University of Illinois at Chicago

Distinguished Professor, 2005-09至2011-05

华东师范大学

数学研究所, 所长（兼职）, 2002-09至2011-05

University of Illinois at Chicago

Department of Mathematics, Statistics and Computer Science, Professor, 1984-08至2005-08

John Hopkins University

Visiting Professor, 1989-08至1990-07

Yale University

Visiting Professor, 1984-08至1985-07

University of Illinois at Chicago

Department of Mathematics, Statistics and Computer Science, Associate Professor, 1980-08至1984-07

The Institute for Advanced Study（普林斯顿高等研究院）

Member, 1981-09至1982-08

Harvard University

Department of Mathematics, Assistant Professor, 1977-09至1980-08

The Institute for Advanced Study（普林斯顿高等研究院）

Member, 1976-09至1977-08

State University of New York at Stony Brook

基础数学, 博士, 1974-08至1976-07

State University of New York at Stony Brook

基础数学, 硕士, 1973-09至1974-07

香港中文大学 (The Chinese University of Hong Kong)

基础数学, 1970-09至1973-07