The architecture, engineering, and construction (AEC) industry has traditionally been structured based upon a firm concentrating on select markets and specific service offerings. More recently, however, the industry has moved away from the piece by piece process of developing a project into a more holistic view. This paper suggests the concept that holistic strategies can create positive business synergies. Two types of synergies are identified - synergies related to practice and knowledge and synergies related to service and delivery. Examples of these synergies are provided with cases provided for engineering, architecture, and management firms. The increase in strength of the firm as a result of the strategy is more than the net additive growth or change; hence, it is deemed synergistic. Conclusions identify the synergies outcomes and discuss the need for future research in this area, particularly data-based research to test the theory.