Citi will be hosting a Sales & Trading Summer Associate Interviews in mid-January.
For any candidates interested in applying, they must do so at www.oncampus.citi.com by December 31st. The vacancies they must apply to is as follows: US - Institutional Clients Group - Summer Associate - Sales Trading & Quantitative Analysis - New York
"We hire extraordinarily talented people, who can leverage their academic training and grow through intensive on-the-job experience ultimately providing innovative assessments of market opportunities and effectively communicate their information and ideas." http://www.oncampus.citi.com/careers/north_america/institutional_clients_group/sales,_trading_and_quantitativ/associate.aspx
Be resourceful and search out as much information as possible.