Personal Secretary

acting as a first point of contact for callers, dealing with emails and phone calls by responding, passing on messages or highlighting them for their managers attention
managing diaries and organising meetings and appointments, often controlling access to the manager/executive
booking and arranging travel, transport and accommodation
organising events and conferences
reminding the manager/executive of important tasks and deadlines
typing, compiling and preparing reports, presentations and correspondence
managing databases and filing systems
implementing and maintaining procedures/administrative systems
liaising with staff, suppliers and clients
collating and filing expenses
miscellaneous tasks to support their manager, which will vary according to the sector and to the managers remit, eg completing some corporate governance reporting (to ensure that the business is being run properly and complying with legislation and regulations) or conducting research.