Christina Lomasney has been replaced as president and CEO of Modumetal, the Seattle startup she launched 13 years ago in a quest to find an alternative material that could hold up to corrosion better than steel. The University of Washington-trained physicist and longtime entrepreneur said this week that she resigned from the privately held company in February, just weeks after Modumetal secured $14 million in new funding. “I would have never left,” Lomasney told GeekWire. “This was not my choice.