Dominic Stephenson, 27, who worked for architects 3D, has been confirmed as killed and his girlfriend, Eileen Lee, 24, who worked as an events coordinator at the RIAS, is still missing.
The pair were on holiday in Koh Phi Phi island, Thailand, when the tsunami struck, and have been missing ever since.
Stephenson was educated in Edinburgh at George Watson's College and took a degree in architecture at the University of Strathclyde.
He recently settled into a job at Edinburgh-based 3D Architects while preparing himself to take his Part 3 professional exams.
To date Lee's body has not yet been found, though efforts to trace her are continuing.