BTIG, a broker dealer specializing in institutional trading and related brokerage services, has expanded its fixed income group with the hiring of David Kallenberg as a managing director for its new Convertible Securities Desk in Los Angeles.

BTIG’s Convertible Securities Desk, led by Robert Langer, head of High Yield and Convertibles Sales and Trading, was launched in October 2009 to complement the firm’s equities, fixed income and prime brokerage offerings.

BTIG’s Convertible Securities Desk is part of its Global Fixed Income group that provides expertise and execution across the capital structure for institutional investors.

Kallenberg will join BTIG from KKS Securities, a convertible securities boutique that he co-founded in 2008, which was then bought by Sterne Agee in 2010. Before that, he held a various US-focused convertible securities roles at Thomas Weisel Partners, Amaranth Advisors and William Blair, a Chicago-based brokerage firm, where he built the convertible securities desk and was head of trading and risk management.

BTIG said Kallenberg will join a team of seven professionals on BTIG’s Convertible Securities Desk that includes Jacob Creem, Bill Feingold, Will Frohnhoefer, David Lochmann, Kevin McGuire and Donald Pizzutello.