1,600 people in 24 cities living 4 values for 1 goal:
To use design to help our clients succeed.

We create exceptional environments that meet our clients' most complex design challenges.

We inspire people through our work by expressing timeless cultural, organizational and personal values.

We connect people and place with ideas that come from many minds and imaginations.

We care about serving our clients, enriching lives, improving communities and protecting our natural environment through design.

We are a global architecture, design, engineering and planning firm.

60+ Years of Design + Innovation
Firm-Wide, Design Leaders

Bill Hellmuth FAIA, LEED AP® BD+C

Chairman + CEO
Executive Committee + HOK Board + Design Board Member

+1 202 944 1519


Bill Hellmuth

Bill Hellmuth, FAIA, LEED AP BD+C, is HOK’s chairman and CEO and the design principal for the Washington, D.C. office. He is known for his creative design approach, innovative problem solving and exceptional client service.

Bill joined HOK in St. Louis in 1991 and two years later was promoted to lead HOK’s office in Washington, D.C. After more than a decade as design principal in D.C., he was elected firm-wide president in 2005, CEO in 2016 and chairman in 2017.

As a strong advocate for sustainable design, Bill began integrating sustainability into every project long before LEED certification became a benchmark. Today, he uses building science and sustainable design strategies to create high-performance buildings around the world. In 2016, as part of HOK’s partnership with Delos, Bill was invited to join the Delos Advisory Board to provide counsel on the impact of design on healthy buildings.

Bill is an executive board member and Senior Fellow of the Design Futures Council. The University of Virginia’s School of Architecture honored him with its Distinguished Alumni Award.

What is a great building?

“Great buildings remain relevant over a long period of time. A great building has a certain integrity in its architectural moves and devices. Its design is rooted in meaning, not fashion. Great architecture is inspiring and uplifting. It contributes to the culture, society and fabric of its place.”


AIAS Presents: “Ask an Architect” | YouTube 

Bill Hellmuth Elevated to AIA’s College of Fellows | HOK News

The Evolution of Modern Architecture, Engineering and Design Firms | Urban Land

Q+A: HOK CEO Bill Hellmuth | ARCHITECT Magazine

Designer Q+A: Bill Hellmuth | HOK News

Bill Hellmuth Talks Acquisition and Architecture | ENR



Princeton University
Master of Architecture

University of Virginia
Bachelor of Science (Architecture)