management:
(a collective noun — mostly used in singular form for both singular and plural and a singular verb or a plural verb can be used depending on the context; pronunciation: the letter ‘g’ rhymes with the letter ‘g’ in “judge”)

the management of a company
a person (or persons) who is in charge of a company controlling or directing the day-to-day running of the work in that business;
the executive body of a business;
manager or managers of a company as a group,

the management of a large company
All the workers are happy that the new management is doing better than the old one.
There is always a dispute between the management and the labour union, and most often the management gives in to the demands of the union.
The administration of an organisation or a company makes policies, and it’s the duty of the management, managers at different levels, to implement the policies to run the organisation more smoothly and to make more profits.
The management of a company has a managing director at the top, and below him/her, there are marketing director, finance director, operations director & HRM director, and below them, in the next tier/layer there are the managers, supervisors, team leaders, and below them are the assistants of sales, accounts, and so on.
