MINNEAPOLIS--(BUSINESS WIRE)--Insignia Systems, Inc. (Nasdaq:ISIG) (“Insignia” or “the Company”) today announced that Glen P. Dall has resigned as president, chief executive officer and board member, effective today. John C. Gonsior, Insignia Systems’ Chief Financial Officer, has been elected acting President. John Gonsior has been with the company since 2011 and has played a key role in the company’s turnaround efforts, cost reduction initiatives and other leadership efforts. The company has m