na KEO International Consultants . A highly ranked full-service consulting firm providing architectural design, civil engineering, and project & construction management. KEO is strategically located in nine offices worldwide and has over 2,300 professionals. KEO is one of the largest AEP/PMCM firms and have consistently ranked in ENR in the top 200 International Design Firms as well as Top 20 International PM rankings 2004-2010. BD World recently ranked KEO #40 in the Top 100 Architects in the world.