Tim Brady, Yahoo?s senior vice president of network and commerce services, plans to resign at the end of the month. Brady, who was hired as the company?s third employee in 1995, plans to "join the world of academics," said a company representative. No further details were available of Brady?s plans. Geoff Ralston, senior vice president of communications, will assume a large portion of Brady?s duties such as overseeing the editorial team and network central services. In the coming weeks, Yahoo will undergo some minor operational shifts to accommodate the added duties of Ralston, the representative said.