Former Credit Suisse director Jonathan Clark joined SLM Corp. as a senior vice president of corporate finance. Clark will lead the company's unsecured debt issuance and treasury operations. He will also assist the ABS team, according to a company statement. Clark was part of a recruitment haul at Credit Suisse in 2000, when the investment bank appointed Joe Donovan and Greg Richter, among others, to its asset finance group. Clark also worked at Prudential Securities, First Boston and Dean Witter. The student lender also hired John Hewes as executive vice president and chief credit officer, a role in which he will oversee the company's private student loan underwriting policies and credit risk management. For the last 22 years, Hewes led the consumer finance and business lending divisions at MBNA, one of the world's largest credit card issuers.