Lehman needs Yoo.

Lehman Brothers has strengthened its Korean investment banking division with the appointment of Jae Wook Yoo to the firm. Yoo joined Lehman on May 31 as a managing director and deputy head of Korean investment banking.

In the newly created role, Yoo reports to Jae Woo Lee, head of Korean investment banking and Lehman Brothers' Korea country head. As deputy head of investment banking, Yoo assumes responsibility for expanding client coverage and bolstering banking relationships in Korea.

He joins Lehman Brothers from rival Morgan Stanley where he spent two years. At Morgan Stanley Seoul, Yoo was a senior client relationship banker. In total, he bestows 14 years of investment banking know-how to the firm.

Yoo's appointment closely follows Kirk Sweeney's ascension to the country head of Hong Kong, which was another newly created position by Lehman.