<p>Identifying proper vibration qualification tests to mimic the Device Under Test (DUT) “field environment” in a “laboratory setting” poses a significant hurdle to overcome. Much effort has been recently expended in the Dynamic Environments Community to attempt to address this problem. Recently, an Impedance Based Fixture Neutralization (FINE) technique has been proposed to this end; the technique has made positive strides to develop appropriate excitations to accurately mimic the field response in a laboratory setting. This approach uses only measured frequency response functions to formulate the differences in dynamic characteristics between the field and laboratory configurations. Impedance FINE has been shown to provide very good results but provides little insight into the intricacies as to how the structure frequencies and mode shapes determine the response. This work provides an alternate approach using the modal basis as a mechanism to identify the appropriate laboratory loads to achieve the same result in field and laboratory; this approach is referenced as the Modal FINE technique. The technique relies on prediction of modal forces to estimate the physical forces that achieve the proper input excitations in the laboratory that cause the DUT to have the same response observed in the field. One very important piece of the process is called the Modal Amplitude Contribution Matrix (MACM) which clearly identifies which laboratory modes are necessary to predict the field response from the field modes of the DUT. The technique is described in detail and both analytical and experimental configurations are used to demonstrate the accuracy of the technique.</p>