In February, 2011, Anthony Piszel resigned as chief financial officer.
Those who knew Spock could not imagine a scenario under which the Vulcan would have resigned as commanding officer.
TV, was forced to resign as chief financial officer last fall.
In addition, James K. Dutton resigned as president and chief executive officer.
Jawara resigned his position as chief veterinary officer in order to contest the 1960 election.
In May, the company announced that Alan Henricks had resigned after just three months as chief financial officer.
Mr. Antar resigned as president and chief executive officer late last year, but stayed as chairman.
Mr. Eller resigned as chairman and chief executive officer on May 7.
Mr. Barker has resigned as chief executive officer, the company said, and will relinquish his title of chairman when the sale is completed.
Barry Romeril resigned as chief financial officer in December and has not been replaced.