JOHN McGreal and Rene Gilmartin have agreed to terminate their respective contracts 'by mutual consent'.
Town's new manager only arrived at the County Ground on May 26 while Gilmartin was confirmed as the club's new number two on June 1.
However, in a day where Town CEO Steve Anderson also left his post, there has been yet more change at SN1 as the club will now have to begin its search for new leadership at two different levels.
In a statement on the club's website, Swindon Town said: "We would like to thank both for their hard work and professionalism during their short stay at the County Ground under very difficult circumstances.
"We would like to wish them both the best for the future."
Meanwhile, McGreal and Gilmartin published a joint-message which said: "This is a decision we both have made, as we feel we are not able to carry out our duties as Manager and Assistant Manager.
"Our intention from day one was to build a football team to compete in this league, but unfortunately due to the current circumstances the club is facing, we do not feel we are able to do that.
"As mentioned earlier this week, we have signings ready to be announced, however the legal proceedings involving the ownership has not allowed us to do so, making our positions at the club untenable.” - John and Rene."
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