Technical management involves the duties a shipping company must perform for the technical operation of a vessel. This involves management related to crew management with related tasks, logistics related to operations as well as operations, service and maintenance.
Often technical management is performed by the ship owning company, but not always. Technical management is sometimes performed by separate companies than the commercial management, that involves chartering of the vessels and the financial aspects that is performed by the owner company.
Technical manager also involves managing all areas of technical support.
References
Technical management Wikipedia(Text) CC BY-SA