ONE! - The Merger of Two

In 2013 Curtis Architecture and Gilleland Brubaker Architects merged their firms into the single firm known today as One Architecture, PLC, or just ONE! The merger combined the two firms whose histories and experiences are written below.


The new and improved ONE was built to better serve our local, regional and national clients.  To do this effectively we team with local architects, designers and drafters from coast to coast providing the service required to make us local experts no matter where we are. Our affiliates are required to have a minimum of ten years experience in the city in which they work. This requirement is essential to our process and allows our clients to benefit from our always local relationships with governing agencies, general contractors and engineers.


ONE! currently works with over two dozen architectural, engineering and specialty firms across the United States in a combined effort to serve the design needs of our clients.

Curtis Architecture, Inc.

Phoenix, Arizona


Curtis Architecture is a full service architectural firm with a wide array of projects and experience. Established in 1993 and through their collaborative efforts with ONE! they provide a service that is both reliable and economical with a local staff that is intimately familiar with the unique  architectural requirements of the desert southwest.

Forming strong relationships with their clients, collaborators and employees is the essence of Curtis Architecture. Establishing those strong bonds opens the way for great design and clear communication, which in turn provides each client a quality project and an experience worth repeating.


Gilleland Brubaker Architects

Phoenix, Arizona


GILLELAND BRUBAKER ARCHITECTS was incorporated in 1980 and is an Arizona architectural firm which can legitimately claim responsibility for hundreds of educational projects throughout the State of Arizona from Flagstaff to Yuma. Our project experience crosses the spectrum of budget, scope and geographic location and our experience with the personal facets of those projects is just as broad. The relationships we’ve built with administrators, board members, contractors and municipalities are not by chance. Architecture is more than bricks and mortar, it is working with people.


This field has been and continues to be our main area of practice, expertise and passion. Imbedded in our years of experience are not only new school designs but dozens of additions, renovations and remodel projects. We have designed many new high school and middle school campuses and dozens of elementary school campuses. In addition, our work includes high school performing arts centers (auditoriums),  athletic fields, transportation facilities and district offices.


We also have extensive experience with community college campuses, from new classroom facilities to central plant renovations. Our philosophy of no project to big or too small has endeared us to our clients who understand that we will be there no matter what their needs.


Our Team ONE! Affiliates

RAN Design

Edwardsville, Illinois

(Greater St. Louis, Missouri Area)


RAN-Design provides retail & restaurant design layout, drafting and project management services. As an affiliate of ONE! Architecture we are able to provide our services nation wide. We also partner with mechanical, electrical, plumbing and structural engineers to provide comprehensive services for of our clients' various food service and retail needs.


RAN-Design has 17 years of retail & restaurant experience and 15 years of hands-on construction experience, with diverse experience in developing commercial, retail and restaurant design. We provide complete project management services for single-track projects and multiple projects in the corporate, prototypical rollout setting.

SCM Design

Vancouver, Washington

(Greater Portland, Oregon Area)


SCM Design has developed a special focus to the design and construction of senior housing projects. Our specialty is new construction and renovations of independent living, assisted living, Alzheimer's special care units and nursing homes. Founding Principal, Silvia Marquart pays special attention to the design details, creating spaces focusing on the physical and mental well being of the senior residents. Her technical knowledge of building codes and local state rules assures the success, both aesthetically and financially of a project from conceptual design through construction.

Through our alliance with ONE! we are able to provide our unique skill set to a larger population.


Silvia Marquart - Founding Principal
Phone: (360) 314-8108


The Circle Studio

New Orleans, Louisiana


The Circle Studio was founded in 2007. This Interior Design firm specializes in restaurant, retail, hospitality and professional office projects, with a bit of medical thrown in for good measure. Principal Shannon Downey has over 20 years of experience in programming, space planning, interior detailing, as well as the selection of interior finishes, materials and furniture. Her designs are both practical and trendy; a combination that her clients truly appreciate.


In addition to her Interior Design skills, Ms. Downey has worked for several architectural firms and has an extensive background in project management including construction administration. Circle Studio allows One Architecture to succeed with projects that have a large interior and finishes component in a way we would not be able to with traditional arcitectural services alone.