si es para transmitir información hacia afuera de la organización.

RAE:

informante.(Del ant. part. act. de informar).

1. adj. Que informa. Apl. a pers., u. t. c. s.

Esta es la descripción que ofrece PROSPECTS, quizá el mejor proveedor de "Career Services" del Reino Unido:
An information officer/manager manages and develops the procurement, supply and distribution of information for an organisation/client in support of the group's needs or objectives. Services may be provided internally and/or externally and will often deal with electronic information, especially online databases and internet resources, as well as traditional library materials. Increasingly, the role involves managing and exploiting internally produced information as well as sourcing and providing materials from outside organisations.

Information officers/managers can be found in a wide range of organisations, including central and local government, public libraries, the health service, education, media, the financial and legal sectors and NGOs (non-governmental organisations).