Promotion Plus Sign Co., Inc. is the leader in brand imaging. As a full service Sign Company based in Southern California, ou ... r diverse expertise gives our clients the confidence to know their project is handled by our professional team. With over a quarter of a century of experience, Promotion Plus Sign Co., Inc. works with some of the largest companies in the world. As experts in image consulting, our project management team guides clients to achieve their special scope with accuracy and quality. read more