The institutional broker-dealer unit of the Susquehanna International Group of Companies has added two industry veterans.

Susquehanna Financial Group has announced that it has hired two former Kellogg Partners to bolster its preferred stock unit.

“Mike and Dan have been working as a strong team servicing the preferred community for many years,” said Frank Gilroy, SFG’s head of fixed income sales, trading and strategy in a release. “We are pleased to have them on our team as we strengthen and expand our client offerings.”

A request to Susquehanna for comment was not immediately returned.

Prior to joining commercial real estate services firm Kellogg Partners, Stevens spent time at Goldman Sachs and Legg Mason. He began his career, which has spanned 30 years, at Robert Baird and holds a BA from the University of Wisconsin.

Campbell has worked alongside Stevens for the past 10 years as a fixed income salesman, focused on preferred stock. Prior to joining Kellogg, Campbell graduated with a B.A. from Georgetown University.

Stevens and Campbell will both be based in Susquehanna’s New York office.

The two new additions is part of a long-term effort to boost Susquehanna’s operations. Earlier in the year, the company hired Vasily Karasyov as a senior analyst covering media, cable and entertainment.

Late last year, it added Marc Pinto as head of corporate bond strategy of its fixed income group, focusing on the financials sector. Also late 2010, it hired David Fox as senior agency trader and developer of Susquehanna’s government sponsored enterprise trading platform. All the additions were based in New York.