Brian McFadden, Nortel's chief research officer, and Sue Spradley, president of global services and operations, left the telecommunications equipment maker as of Nov. 28, the company said Wednesday.
McFadden and Spradley had worked for Nortel for 28 years and 18 years, respectively.
The management shakeup comes only weeks afterfrom William Owens, the former Nortel CEO.
Zafirovski, who , has taken the CEO post at a critical time in Nortel's history as the company tries to rebound from anthat resulted in several as well as .
Peter Carbone, vice president and chief architect for Nortel, will take over the research officer post while the company searches for a new chief technology officer.
David Downing, vice president of global services, and John Haydon, vice president of global supply chain, will split Spradley's duties until a replacement is found.