ONE was established in 1992 by partners James Nelson, PE, FPE and David Obermiller, PE. Since its founding, ONE, Inc. and its people have helped redefine the meaning of building systems consultants. The firm has continually broken new ground in advising our clients on building systems including pioneering in advanced energy saving technologies. ONE brings innovative ideas and exemplary services to advance the quality and comfort of every building we design. As we progress into the future our aim is to design systems with the latest technology and energy efficiency by utilizing resources such as LEED Certification to achieve Net Zero Buildings.