SPRINGFIELD — The Effingham County Industrial Development Authority is looking for more than new business partners these days. It’s also in the market for a CEO.John Henry, the organization’s longtime leader, recently resigned.The IDA issued a news release Thursday that said, “John Henry resigned as CEO of the Effingham County Industrial Development Authority (IDA) effective at the close of business Friday, Dec. 1. The IDA appreciates John’s many years of service and wishes him well in his future endeavors.