Close

ABOUT

ABOUT

ABOUT

Quatrefoil was founded in 1989. The firm grew from a basement start-up with an initial focus on small projects for museums in the Mid-Atlantic to a leading exhibition design-build firm with clients across the United States including history and art museums, science centers, zoos and aquariums, historic sites, cultural and visitor centers and more.

A new generation of Partners now leads the team. Michael Burns, Roula Tsapalas and Bernhard Mueller have worked closely together for more than a decade on many of Quatrefoil’s largest and highest-profile projects. Each brings unique background experience and skills to their roles.

Together, they lead a firm with full and part-time professionals representing every phase of project development, including master planning, 3D and graphic design, multimedia interactive development and programming, content development and research. 

Bernhard Mueller
Bernhard Mueller

Partner
Chief Executive Officer

Michael Burns
Michael Burns

Partner
Director of Design Strategies



Roula
Roula Tsapalas

Partner
Chief Operating Officer

Ernie Falcone
Partner Emeritus

Abbie Chessler
Partner Emeritus

Quatrefoil supports the principles of Diversity, Equity, Accessibility, and Inclusion, and we are committed to working toward a better understanding of the social history of the places in which we work and live. We acknowledge that we’re at the early end of this learning curve, and we’re committed to doing better.

A powerful source of learning comes from the institutions with whom we engage to explore ways to share difficult and sensitive history. In working on projects including Central High School, Against Their Will, Lakeport Plantation, Defining Courage, and We Are of This Place, we have been enriched with new knowledge and new perspectives. We hope that by helping these institutions share their histories, collections, and stories, we have enabled them to broaden their reach and their impact.