His younger brother Diarmiud Roonan is also a footballer at Inverness CT.
He signed on loan to Home Farm in 2013. Eirís Roonan was released in May 2014 after the Highland Cup along with 23 others.
He signed with Dundalk in June 2014.
In January 2016, he dropped a league signing for Cabinteely.
2010-2014 ICTFC U20
2013-2014 Home Farm (loan)