ADTEK Engineers, Incorporated. ADTEK, founded in 1987, is an organization of engineering professionals located in Fairfax, Virginia. ADTEK’s project management team is dedicated to providing a level of service that maximizes client satisfaction and emphasizes quality control at critical phases of every project. ADTEK’s clear strength is its ability to produce accurately coordinated, bidable, and constructable contract documents. ADTEK’s project management team is dedicated to providing a level of service that maximizes client satisfaction and emphasizes quality control at critical phases of every project. ADTEK’s clear strength is its ability to produce accurately coordinated, bidable, and constructable contract documents.