Get our LinkedIn presence sorted

Hello,
We are a small company with one main office in Switzerland and one subsidiary in Belgium (another subsidiary will open soon in the UK).
We are small operations and we operate through agents in various countries.
We need a uniform LinkedIn presence to align the subsidiaries (Aderco Marine sprl and Aderco Ltd. and the agents under or with Aderco International SA.
The idea is to also use LinkedIn to link up with the industry (marine shipping for Aderco Marine; oil-fired power generation, mining and transportation for Aderco Ltd.; commercial fuel conditioning; private label solutions for Aderco International SA) and establish ourselves as a credible organisation.