 interim CEO Ross Levinsohn as CEO of private equity unit Guggenheim Digital Media.In May & June 2013, the firm also hired Goldman Sachs Group Inc.’s co-head of U.S. leveraged finance capital markets Tom Stein, former Barclays head of retail investment banking and vice chairman Andrew Taussig, as well as managing directors Spencer Hart, Matthew Pilla, Ken Harada and Ryan Mash.In September 2013, Guggenheim Securities was named a financial adviser to Verizon in connection with its $130 billion acquisition of Vodafone's 45% stake in Verizon Wireless.