Principal Technology, Inc., located in Plano, Texas, is an established business serving the energy industry and manufacturing markets. The business units of PTI specialize in providing Sulfur Recovery and Environmental Systems, related Specialty Equipment, Modular Process Units, Engineering, Design, and Fabrication Services, and Control System Integration. Through its core competencies in the mechanical, instrument, electrical, process, and control system disciplines, PTI provides a special combination of high value engineering and design services with practical design-build capabilities to provide our customers with complete project integration.