Abstract: According to one example embodiment, the inventive subject matter herein provides a system that integrates a plurality of heterogeneous systems in support of a Professional Employment Organization (PEO). According to one example embodiment, the system of the inventive subject matter connects a plurality of heterogeneous systems using a shared data store in the form of a data web. The systems may share data through the data web to provide a variety of functions to support the PEO, wherein the functions are supported by the heterogeneous systems. An interface system is provided to provide access to the functions of the heterogeneous systems, wherein the interface provides a homogenous view of the heterogeneous systems and functions.