Episcopa On 23 May 1953,
Juhanon Mar Thoma Metropolitan assisted by
Mathews Mar Athanasius Episcopa ordained Oommen as Episcopa and gave him the episcopal title Philipose Mar Chrysostom. M. G. Chandy (Alexander Mar Theophilus later
Alexander Mar Thoma) and P.Thomas (Thomas Mar Athanasius) were ordained on the same day. In 1954, Mar Chrysostom joined St. Augustine's College,
Canterbury, UK to further his theological studies.
Suffragan Metropolitan He was designated as Suffragan Metropolitan in May 1978. When the newly-formed
Diocese Zone in New York was created in the 1980s, Chrysostom was placed in charge of this area.
Officiating Metropolitan After Alexander Mar Thoma Metropolitan stepped aside from the daily administration of the church due to ill-health on 15 March 1999, Mar Chrysostom was designated Officiating Metropolitan.
Metropolitan Mar Chrysostom was installed as
Metropolitan on 23 October 1999 when Alexander Mar Thoma Metropolitan was made Valiya Metropolitan. (Senior Metropolitan)
Valiya Metropolitan ( Metropolitan Emeritus) On 28 August 2007, Thirumeni announced his resignation as supreme head of the Malankara Mar Thoma Syrian Church on grounds of old age and ill-health == Biopic ==