It is an inescapable fact that composite structures have permeated the aerospace industry. With this comes a need for improved production rate and enhanced manufacturing process reliability. Current methods of joining composite structures, namely, mechanical fastening or adhesive bonding, present a variety of challenges (e.g.: slow cycle times, low fidelity processes, coefficient of thermal expansion mismatch, etc.). Fortunately, the increased use of thermoplastic resin systems enables new joining methods that take advantage of their re-processability. One of these methods is resistance welding, where an electric current passed through a conductive material placed at the interface between two structures locally increases laminate temperature and melts the polymer. With the application of time and pressure, a fully consolidated joint can be produced. The fabrication of high performance thermoplastic joints via resistance welding will be presented. Both joint micro-structure quality evaluation and mechanical performance will be presented. Additional insight into important aspects of the manufacturing process will also be discussed.