Underwriting firm MSL Captive Solutions has appointed Keith Peterson as assistant vice president and lead business development consultant. Peterson will be responsible for developing and managing relationships on a national level for MSL. Based in Philadelphia, Peterson will report to Phillip Giles, managing director of MSL. Peterson has more than 10 years of experience in medical stop loss underwriting and managing general underwriters. . Peterson comments: “I am thrilled to join MSL Captive Solutions as the captive market continues its growth amidst increasing premiums and a high frequency of catastrophic claims.”