Curators	Curators oversee collections in museums. They acquire items for the collections, plan and prepare exhibits. Catalogue and organise their collections. In natural history museums, curators collect and observe specimens in their natural habitat, describing and classifying species. Most curators specialise in a field, such as botany, art, palaeontology, or history. A large natural history would employ specialists in birds, fishes, insects, and molluscs. Some curators maintain the collection, others do research, and others perform administrative tasks. [source]
Registrars	Keep track of and move objects in the collections, may be responsible for multiple tasks, from maintaining collections to directing the affairs of museums. [mainly USA] [source]
Collection managers	Collection managers are responsible for all aspects of collection management and development, selection of information resources, collection management, faculty liaison, collection interpretation, collection evaluation, budgetary management, and resource sharing. Specially trained collection managers provide hands-on care of natural history collections. [source]
Conservators	Conservators manage, care for, preserve, treat, and document works of art, artefacts, and specimens. This may require substantial historical, scientific, and archaeological research. They use laboratory equipment and techniques to examine objects and determine their condition, the need for treatment or restoration, and the appropriate method for preservation. They then document their findings and treat items to minimise deterioration or restore items to their original state. Conservators usually specialise in a particular material or group of objects. [source]
Museum technicians	Museum technicians assist curators by performing various preparatory and maintenance tasks on museum items. Some museum technicians also may assist curators with research. Specially trained technicians provide hands-on care of natural history collections. [source]
Archivists	Archivists and curators plan and oversee the arrangement, cataloguing, and exhibition of collections and, along with technicians and conservators, maintain collections. Archivists mainly handle valuable records, documents, or objects that are retained because they originally accompanied and relate specifically to the document. [source]

In many institutions these professions may now be complimented with additional exhibition professions...