The link Dennis provided is a good place to start. If you want help narrowing down this extensive list you may want to first investigate the Alliance Menbers that have at least one NI Certified LabVIEW Architect on staff. (No, I am not a CLA).
National Instruments Certified Architects have mastered not only the technical aspects of the product, but can implement the most efficient solution in a team environment. A Certified Architect is the highest level of certification available from National Instruments, and signifies the ability to lead complex projects from conception through completion." A complete list of CLA's can be found here; http://volt.ni.com/niwc/common.jsp?page=products_certification_cla&node=10640 Ben
