TOGAF describes three types of architecture role. Two of these types - Enterprise and Solution - are often used in the job title for architects, but it is rare to find someone called a Segment Architect. If you are confused about this missing role... read on, and all will be revealed.
Architects sometimes see the ADM as reactive, but EA should never be passive - it needs to respond to concerns, but add architectural thinking and then make a unique contribution to stakeholder needs. This blog explains some of the proactive aspects of ADM that are not so obvious.