Sign Age Identity Systems, Inc.Sign Age Identity Systems, Inc. Sign Age Identity Systems has been one of Southern California’s fastest growing Design/Build companies. Our growing number of professional staff provide our clients with over 110 years of collecti Sign Age Identity Systems has been one of Southern California’s fastest growing Design/Build companies. Our growing number of professional staff provide our clients with over 110 years of collective experience and knowledge. From submitting timely bids, planning, project management, design services, fabrication, and installation, we work deliberately to assure your success and peace of mind.