The parent of American Mobile Systems of Woodland Hills is relocating its corporate headquarters from New Jersey to Seattle.
The move reflects the growing role of cellular phone tycoon Craig McCaw's increasing influence on Nextel Communications Inc.
The announcement followed the resignation of Wayland Hicks as Nextel's chief executive. He was replaced by Dennis Weibling, an associate of McCaw, who is chairman of Nextel's Operations Committee.
In addition, Brian McAuley left his position as president of Nextel, but remains vice chairman of the company.
Nextel is a leading provider of wireless communication services. In April, the McCaw family agreed to invest up to $1.1 billion in Nextel during the next six years.
American Mobile, a provider of specialized mobile radio services in Florida, agreed this year to merge with Nextel in a stock swap valued at $65 million.