SeaWorld security guards voted 23-10 against joining the same union that represents guards at Disney World.
The open jobs include positions for which SeaWorld had recently permanently laid off furloughed employees.
The event will run Thursdays through Sundays from Oct. 1 through Nov. 1, as well as Columbus Day.
California cities want Gov. Newsom to allow theme parks in the ste to reopen, and the parks themselves are becoming more critical of the governor.
Comcast CEO Brian Roberts said some guests may not return to theme parks until a COVID-19 vaccine is available.
21-year-old Jacob Kaminsky, who died in an accident at the Orlando StarFlyer Monday, had worked on Busch Gardens' Iron Gwazi coaster.
The new maze will be included with admission to SeaWorld on weekends through Nov. 1.
Four of the 10 scare zones will be new for this year's event.
"SeaWorld has determined that it must transition certain park and corporate personnel from a furloughed status to a permanent layoff," the company said in a statement.