The Fermoy native was reported missing by her husband Richard, who returned home from shopping in Dungarvan to discover she was not at home.
More than 370 lines of enquiry have been carried out since her disappearance, according to gardaí, including liaison with colleagues internationally and engagement with Interpol.
Over 100 hours of CCTV has been viewed and in excess of 170 statements have been taken.
A search of woods in Castlemartyr were also carried out but no trace of the missing woman was found.
Adrian Gamble said “An Garda Síochána are firmly of the belief that credible information exists in the East Cork community that can assist our missing person investigation.
“The team and I continue to actively investigate the disappearance of Tina Satchwell in March, 2017, and I appeal for anyone who has further information, no matter how insignificant they think it may be, to contact Midleton Garda Station on 021 – 4621550, the Garda Confidential Line on 1800 666 111 or any Garda Station. Any information will be treated in the strictest of confidence.”
Tina is described as 5’ 7’’, of medium build with blonde shoulder length hair and blue eyes.