Another management change is taking place at IEC Electronics Corp. The Newark, Wayne County, manufacturer announced Monday the resignation of Brett Mancini, vice president of business development and engineering services, effective April 9. "On behalf of IEC, I would like to thank Brett for his contribution to the company over the past seven years and wish him all the best in his future endeavors," said Jeffrey Schlarbaum, IEC president and CEO. "Brett will assist over the next few weeks as we transition his duties and evaluate both internal and external candidates for this role."