Dr. Athanasious is currently doing research in Trinity under renowned scholar and theologian Commander Prof. Dr. C A Ninan PhD, DSc, DLitt, DD.
On 2 November 2002, Kassisso Eliyas was elevated to the order of Ramban (Dayroyo) by Catholicos Baselios Thomas I at the Mor Sabor Afroth church in Akaparambu.
On Monday 1 January 2007, Catholicos Baselios Thomas I ordained Rabban Eliyas as Metropolitan Athanasious at the St. Athanasius Cathedral, Puthencuriz, in the presence of many religious and government dignitaries.
Baselios Thomas I was the chief celebrant and Metropolitans Gregorios Joseph and Chrysostmos Markose were the co-celebrants during the holy ceremony.
Athanasious was appointed as the President of the Antiochean Movement in India and vicar-general of St. Athanasius Cathedral at Puthencuriz Patriarchal center.