Described herein are embodiments of a system that permits various entities (e.g., hiring, staffing, and client computer systems and/or devices) involved in the placement of a candidate to a job to interact systematically to carry out functions that conventional systems are unable to perform. These functions may, for example, include synchronizing systems of different entities involved in placing a worker, effectively tracking a temporary workers during a placement and/or hiring process, and post placement activities. To this end, systems and method are provided that permit a handshake process between disparate systems to complete a candidate placement process, timesheet approval and processing, consolidated invoicing, customized analytics and reporting, supplier onboarding of temporary workers, and post-hiring tracking, among other novel tools, interfaces and functionality.