Eugene Tssui (/tsweɪ/ Chinese: 崔悅君; pinyin: Cuī Yuèjūn born Eugene Tsui, September 14, 1954)[1] is an American architect noted for his use of ecological principles and "biologic" design, a term coined by Tssui himself in the 2010 issue of World Architecture Review.

[2][3] He has proposed a number of projects such as a bridge across the Strait of Gibraltar to connect the continents of Africa and Europe as well as a 2-mile-high tower capable of housing 1 million residents.

[9] The goal of this approach is to create buildings that take into account environmental challenges, and apply the patterns found in the local environment to solve them and avoid potential adverse results.

[33] In his furniture design, Tssui uses principals of maximum strength using the least amount of materials: similar principles which are found in his biologic style of architecture.

"[42][43] Tssui has also contributed to a number of short films, including "S.A.C.E.Y./SAFE PLACE ALTERNATIVE" and "Time To Save the Wolves," for which he composed the piano music.