New York--Media merchant bank Veronis Suhler Stevenson has appointed four new managing directors. J. Morgan Callagy, who joined the firm in 1996, has been named managing director of Veronis Suhler Stevenson International Ltd., which is based in London. Kevin Waldman, who joined VSS in 1996, was named managing director of the VSS Private Equity group. Xiaohong Chen, a nine-year veteran of the firm, was named a managing director of VSS Investment Bank. David Bainbridge, who recently joined the firm from Berkery, Noyes & Co., where he was a managing director, has been named a managing director of VSS Investment Bank.