Peter Lawwell will return to the SPFL board for 2020/21 while St Johnstone chairman Steve Brown is also set to be added to the SPFL management team.
They will join Hamilton's Les Gray as representatives of the Scottish Premiership. Rangers' Stewart Robertson will step down with the Ibrox MD doing so as part of a gentleman's agreement that sees Glasgow's big two swap positions every year.
Motherwell's Alan Burrows departed after deciding to let others get involved.He Tweeted: "I have thought long and hard about it.
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