Xconomy -- Cambridge, MA-based Helicos BioSciences (NASDAQ:HLCS), a developer of genetic analysis technology for molecular diagnostics, said today it has named Ivan Trifunovich as the company’s president and CEO. Trifunovich, who was named the firm’s executive chairman on September 15 and has previously served as its consultant, is a former senior vice president of Third Wave Technologies, a molecular diagnostics company that is now part of Bedford, MA-based Hologic (NASDAQ:HOLX). Helicos’s board of directors asked its former CEO, Ron Lowy, to step down from that post. Lowy has returned to his seat on the firm’s board of directors.