South Korea's leading private equity firm Hahn & Co. promoted two senior executives to C-suite positions on Wednesday as it moves to strengthen its core investment and portfolio management capabilities. Managing Directors Lee Dong-chun and Daniel Sung-Kwan Cho were promoted to Chief Portfolio Officer and Chief Investment Officer, respectively. Lee will oversee the management of the firm's portfolio companies, while Cho will lead new investments. Lee, a former vice president of Sony Korea's Devic