Connecture CFO James Purko left the company at the end of December to pursue other opportunities. The company said Purko’s departure was planned and it is seeking a replacement. Purko had been with Connecture since 2011. The Brookfield, Wis.-based company creates platforms for exchanges and online marketplaces for employers, health insurers and federal and state governments. It works with large insurers, such as Blue Cross and Blue Shield affiliates, and provides the technology behind Medicare.gov and some state health insurance exchanges.