- David Ellender is CEO of Halcyon Studios , a full service television production company, operating out of the company's Los Angeles Offices. Prior to Halcyon Studios David was CEO of Sonar Entertainment and earlier in his career held c-suite executive roles based in London with Fremantle, Universal Studios Television International , PolyGram Filmed Entertainment and Viacom International.- IMDb Mini Biography By: David Ellender
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