Excet has experience and expertise in providing engineering support, and recently developed the overall and subsystems design for the Whole System Live Agent Test (WSLAT) project to test new biological detectors with aerosolized live biological agent. Our responsibilities included the development of the aerosol generation system, aerosol formulation testing and analysis, aerosol collection and detection systems, aerosol removal system, aerosol conditioning system, facility HEPA filtration system, biological stimulants development, and Computational Fluid Dynamics (CFD) modeling analysis for the design of the aerosol circulation chamber. This multi-year program required extensive coordinating of scientific and engineering resource to achieve a successful fabrication and implementation of the WSLAT project.