He was also a prominent architect who designed the Missionary Training Center in Provo, Utah and the Washington D.C. Temple.

[1] In the LDS Church, Wilcox served as a bishop, stake president and regional representative.

Wilcox was called as a general authority and member of the First Quorum of the Seventy in October 1984.

On July 17, 1945, Wilcox married Viva May Gammell in the Logan Utah Temple and they are the parents of six daughters.

Wilcox wrote the work The Washington DC Temple: A Light to the World, a history of its architectural development.