Hello Alchemyst,
If I understand correctly, you have the word 'Pensioner' only from the 1894 marriage certificate of Michael's daughter Margaret? Is that all it says? Was Michael still alive?
Persumably it would not have meant an old-age pensioner because the oap was not introduced in Ireland until 1908. Which certainly suggests that he might have been in the armed forces (or in the constabulary) and thus been in receipt of a pension.
Do you have Margaret's birth certificate? If you don't, perhaps that would be the best step to take next as it might give further information about Michael's occupation?
Looking at the IGI at:
http://www.familysearch.orgI notice some records of children of Michael RUSSELL and Mary HOLMES.
*Thomas RUSSELL b 5 Feb 1865 0217, Carrignavar, Cork
*Marianne RUSSELL b 11 Sep 1867, Cork
*Margaret RUSSELL b 23 Dec 1869, Cork
*Hanna Helena RUSSELL b 27 Dec 1873 Carrignavar, Cork (Michael recorded as Michal)
*Bridget RUSSELL b 10 Sep 1878, Cork
The record for Thomas is the only one which lists the source as being the Irish civil registration records.
So, if you don't have Margaret's birth cert, and if you have any difficulty getting it, then at least you could get Thomas's and see if there is any further information about Michael's occupation on it ...
http://www.groireland.ie/Perhaps the other records are extracted from church records? They too might have further information. You would need to know whether they were Protestant or Roman Catholic if you try to follow up on this.
Very best of luck,
JAP
PS: Re an earlier post (and I'll try to be objective and apolitical - apologies if I don't succeed but I'm trying to be very brief.) Ireland didn't cease to be part of the United Kingdom of Great Britain and Ireland until Dec 1922. Though virtually immediately six of the counties of Ulster opted to rejoin the UK as Northern Ireland. However, what this means is that Irish members of the armed forces at the time of which you are speaking were members of the British armed forces - and their records are to be found in the UK National Archives in London. The National Archives has online research guides which are very helpful in providing information about information available and tips on research.
PPS: Interesting website at:
http://www.carraignabhfear.com/