Sussex appoint former Rugby Football Union director and England fly-half Rob Andrew as their new chief executive.
Out-of-contract Ireland batsman Ed Joyce is "undecided" on his future at Sussex, according to head coach Mark Davis.
Sussex sign South Africa all-rounder Stiaan van Zyl, who has played 12 Tests for the Proteas, on a three-year deal.
Sussex release all-rounder Fynn Hudson-Prentice but teenager Delray Rawlins signs a one-year professional deal.
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A ceremony dedicated to the life of cricketer Matthew Hobden has taken place at the County Ground in Hove.
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