Karno Widjaja is an architectural professional, with experiences bridging architectural design, building performance, and various sustainability initiatives.

He has worked at several firms in Singapore, Hong Kong, Texas, and Boston. Most recently at Bruner/Cott Architects, Karno was the project architect for 288 Harrison Avenue, an affordable multifamily project that will add 85 units to Boston's Chinatown neighborhood. As a Certified Passive House Consultant (CPHC), he was an integral part in the projects' journey to achieving Passive House Pre-Certification. He was also the project designer on Frost Terrace, a 40 unit affordable housing development in the Porter Square neighborhood of Cambridge, MA that weaves together three historic houses, contemporary architecture, and human-centered landscape elements.

Karno was born in Singapore and holds a Master of Design Studies from the Energy and Environments program at the Harvard University Graduate School of Design, and a Bachelor of Architecture from Carnegie Mellon University.