Health Care Service Corp. promoted Catherine B. Nelson as its chief legal officer.Previously, Nelson was the legal advisor to the office of the chairman, CEO and president and served as general counsel of Blue Cross and Blue Shield of Illinois, a HCSC subsidiary.• The Public Interest Law Initiative board of directors elected attorney John J. Bourke to a two-year term as board president.Additionally, the PILI board elected Daniel B. Lange, shareholder at Vedder Price P.C., to vice president; Kyle A. Petersen, partner …