[citation needed] During this time he was invited by Victor Seah to serve on the committee now known as the Movement for the Intellectually Disabled of Singapore (MINDS).
[3] Lyen was part of the team that investigated mass poisoning in Perak, Malaysia in 1991,[4] did an anthropometric study of Singapore School children in 1991[5] and pubertal development in 1995.
[citation needed] He helped establish the Rainbow Centre Singapore which manages both these schools, and trains special education teachers and parents of the students.
[1] Children's Hospital in Philadelphia, Pennsylvania (United States) awarded him a research fellowship in pediatric diabetes and metabolic diseases.
[11] Lyen has co-authored and co-edited several books including Asian Child Care and Rainbow Dreams.