Teradata Architect - role & responsibilities

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Teradata Architect - role & responsibilities

Hi,

Can anyone please let me know what are the responsibilties of a teradata architect? 

Should a teradata architect have data modelling experience? Is it helpful to have certifications to gain some capabilities as an architect? 

Please let me know how can a sr.developer transform into an architect?  what are the additional skills he/she should possess?