GSO Capital Partners LP, the credit arm of The Blackstone Group (BX), announced Tuesday that John Cashwell and Eric Storch have joined the company as managing directors and co-heads of institutional marketing for GSO's Customized Credit Strategies Group. Both men, who joined GSO from Seix Investment Advisers, will lead an effort to expand GSO's presence in long-only credit products for institutional investors through commingled funds and separately managed accounts. Senior managing director and co-founder of GSO welcomed Cashwell and Storch and said, "they will help us deliver investment solutions that meet our clients' needs." GSO Capital Partners is a credit-oriented asset manager with approximately $29bn of management assets. The firm's parent company, The Blackstone Group, is an investment and advisory firm that offers management in private equity funds, real estate funds, funds of hedge funds, credit-oriented funds, and closed-end mutual funds. Write to Christine Ricciardi. Disclosure: the author holds no relevant investments.