Serial CEO Sean O'Leary has been tapped to lead another Triangle technology firm: KnowledgeTree. O'Leary, CEO of Cary's StrikeIron when it was acquired by Informatica for $55 million, has been on KnowledgeTree's board for the past two years. "Sometimes, like Woody Allen says, 99 percent of success is just showing up," he said this week in an interview. "The timing was just right." When KnowledgeTree CEO Chris Atkinson left to head Investor Management Services in Charlotte, O'Leary...