Eric will be on the bench for tonight's Celtic League showdown with champions Ospreys at Old Anniesland, but the PE teacher's school have kept his job open for him.
The Glasgow Hawks skipper said the : "I will be on an 18-month contract with the Warriors and my bosses at St Columba's School in Kilmacolm have agreed to keep my post open until the end of that period.
"I can't thank them enough. It is a fantastic place to work and it is a great comfort to know I have something solid to go back to."
Warriors pack coach Shade Munro said: "Eric's versatlity will make him a valuable commodity for us. He is at home on either side of the front row and will also cover as hooker. With Scott Lawson likely to be absent on Scotland duties over the next couple of months, I am sure Eric will be given plenty of opportunities to prove whathe can do at this level."
Warriors head coach Hugh Campbell admitted he will be fielding a much stronger side than he had anticipated after Scotland chief Frank Hadden released several Six Nations hopefuls, including Jon Petrie, Graeme Morrison and Euan Murray.
Hugh said: "It is a far cry from a year ago when we had to operate with virtually an entire second-choice squad.
"The aim is to establish continuity and momentum after our Heineken Cup win over Bourgoin."
On the inclusion of Currie centre and Edinburgh apprentice Ben Cairns, Hugh said: "It will probably just be a one-off involvement. I am sure Edinburgh will want to keep him after the injury to Rob Dewey."