But with a year still to run on his contract with London Irish the Premiership club are holding out for a substantial compensation package before Catt can be confirmed in the role permanently.
Stuart Lancaster's Red Rose coaching set-up comprised only three people when they finished second in this year's RBS 6 Nations: Lancaster, Andy Farrell and Graham Rowntree.
And with Lancaster keen to make Catt's addition to the three-man team a permanent one an agreement with the Irish needs to be found sooner rather than later.
"We [RFU] are having positive discussions with London Irish and are hopeful of a swift conclusion," a source told the Times newspaper.
England are taking on Fiji, South Africa, Australia and New Zealand in November in this year's autumn internationals and Lancaster will be very keen to have Catt's appointment sorted before those crunch encounters.