In 1994 DynCorp's revenues were approximately $1 billion. By the time of his retirement in 2003, Shapiro notes that Bannister "oversaw the acquisition of more than 40 companies… was credited with helping to mold… an aviation services company into a sprawling conglomerate that employed 24,000 people and earned $2.4 billion in annual revenue." As well he "oversaw DynCorp contracts to operate missile test ranges for the Defense Department, develop vaccines for the National Institutes of Health and install security systems in U.S. embassies for the State Department." Shapiro notes that during Bannister's tenure Dyncorp had also "supplied bodyguards to Haitian President Jean Bertrand Aristide in the 1990s and to Afghan President Hamid Karzai in the early 2000s."