Located in Olathe, Kansas, PEI (Phelps Engineering Inc.) is a full service civil engineering and land surveying firm. PEI provides professional services in Kansas and Missouri with extensive experience in both land development and public works infrastructure projects. PEI provides a single-source solution to solve the challenges of your project. From concept to completion, PEI's team of project managers, surveyors, civil engineers, and inspectors are ready to rise to the challenges of your project at a moment's notice.