The IBM iSeries Financial Systems Support role at insightsoftware involves providing comprehensive support for multiple release levels of financial software, including General Ledger, Accounts Payable, Cash Management, and Accounts Receivable. The position requires maintaining and enhancing financial software modules, managing database corrections, and supporting custom interfaces for data flow. Additionally, the role includes responsibilities in release management, customer support, and infrastructure management, ensuring that the financial systems are up-to-date and functioning optimally.