Six months after being unexpectedly placed on leave, Joe Stuyvesant has stepped down as president and CEO of the Port of San Diego, a role he had served in since February 2021. Days later a longtime port commissioner, Rafael Castellanos, also resigned. Both officials’ departures were effective immediately. Stuyvesant, who was placed on administrative leave in July, officially ended his tenure Jan. 21 after the Board of Port Commissioners accepted his resignation. When asked why Stuyvesant was placed on paid administrative leave, a port official told PMM Online last summer that the POSD was unable to provide additional information, as…