After researching the claims of Sarkeesian being hired by EA for several hours now, I haven’t found anything conclusive. The best article I did find came from an amateur writer on Destructoid dating 2012 who claimed that she tweeted about her involvement on @femfreq. All I found on her Twitter feed regarding ME2 was her excitement for the game and the character Faith. By all accounts, unless I’ve overlooked something glaring, there is no real evidence linking EA as employer to Sarkeesian. All that is out there is conjecture.
The following are links to the Destructoid article and Sarkeesian’s tweets.