managerien
Managerien is a Dutch term that is not widely attested in standard dictionaries. In many contexts it may be encountered as a rare or regional form referring to the domain or practice of managing, but this is not common usage. The more standard terms to express the same ideas are management (the field or practice of directing organizations) and managen (to manage) as a verb, or managers as the people in charge.
Etymology of the form appears to be built from the loanword manager and the Dutch suffix -ien,
Usage of managerien is therefore ambiguous and can be interpreted as either a plural or collective sense
See also: management, leiderschap, organisatiekunde, bedrijfsleiding.
Notes: If you encounter the term in a text, consider the context to determine whether it intends