Brad Cloepfil (born 1956) is an American architect, educator and principal of Allied Works Architecture of Portland, Oregon and New York City.

After working in the offices of Skidmore, Owings & Merrill, in Los Angeles, and Mario Botta, in Switzerland, Cloepfil moved to New York to earn his advanced degree in architectural design.

Cloepfil has designed and realized a wide range of projects around the world, including civic and educational institutions, arts organizations and museums, and private residences.

[4] Allied Works' first major commission for the Wieden+Kennedy Building was awarded after the co-founder Dan Wieden sought out the designer of a local Portland bar called Saucebox, which was one of Cloepfil's early tight-budget projects.

In a state of extreme disrepair after decades as a sealed cold-storage facility, Wieden had doubts of ever moving in there, but Cloepfil convinced him that it was worth the effort.

The Allied Works design turned the dark warehouse into a light-filled, open structure with new concrete and reclaimed Douglas-fir juxtaposed against the existing masonry and heavy timber frame.

[5] Cloepfil's firm was selected in a 1999 design competition for the Contemporary Art Museum St. Louis over world-renowned architects such as Peter Zumthor, Herzog & de Meuron, and Rem Koolhaas.

"[13] Cloepfil used the same massing and geometric shape as dictated by the city zoning regulations, and carved channels into the structure to bring in natural light.

[15] The redesign of 2 Columbus Circle generated considerable attention and debate within the local community and architectural press, including opinion pieces written by Nicolai Ouroussoff,[16] Ada Louise Huxtable,[17] Paul Goldberger,[18] Witold Rybczynski[19] and Justin Davidson.