In 1989, Chen took up a lectureship at the law school at Victoria University of Wellington, and wrote her first book on the discrimination of women under the UN Convention on the Elimination of Discrimination against Women. In 1990, she chaired a government review on the Policy of Excluding Women from Combat, and in 1992 she became the youngest senior lecturer in Law in New Zealand at that time. In 1993, she co-authored Public Law in New Zealand with former Prime Minister Rt Hon Sir Geoffrey Palmer QC, which was published by Oxford University Press.