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 AIA, LEED AP BD+C

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

+1 202 944 1519


Bill Hellmuth

Bill Hellmuth, AIA, LEED AP BD+C, is HOK’s CEO, president, and design principal for the Washington, D.C. office. With nearly four decades of experience, including 25 years at HOK, he is known for his creative design approach, problem-solving ability and 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 and CEO in 2016. He brings special insight on managing the creative process—balancing the art and the business to create the best design solutions and generate the most value for clients. 

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 a an executive board member and Senior Fellow of the Design Futures Council. Senior Fellows are recognized for significant contributions toward the understanding of changing trends, new research and applied knowledge that improve the built environment and the human condition. 

In this Q+A, Bill describes his vision for HOK’s future.

What is a great building?

“Great buildings can 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.”

What is the current state of sustainable design at HOK?

“We’re proud of our historic leadership in sustainable design and the performance of our buildings. Today, our approach to sustainability has become both more scientific and a contributor to the business success of our clients. We can bring deep sustainability to all types of projects while staying within the client’s budget. We’re focusing on how sustainability interacts with building sciences. BIM enables us to set and achieve significant improvements. Our clients are getting terrific energy use results from post-occupancy evaluations.”