Tasks of a https://en.wikipedia.org/wiki/Knowledge_engineer can include:
Making use of even loose taxonomies or categories like: https://en.wikipedia.org/wiki/Category:Knowledge_engineering
Moving some entries to shared terms like: http://dbpedia.org/page/Knowledge_engineering vs several different textual definitions.
When moving from text to things you can use https://en.wikipedia.org/wiki/Named-entity_recognition &resolution.
In general moving from silo-ed data stores, to a more linked-data approach,
which can allow for more authoritative data and ability for much more interesting queries.