What is the plural form of employees-in-traning?

Answer 1

The compound noun, 'employees-in-training' is the plural form.

The singular form is 'employee-in-training'.

Answer 2

The correct plural form of "employee-in-training" is "employees-in-training." In compound nouns like this, the primary noun (in this case, "employee") is the one that gets inflected for plurality. Therefore, when referring to more than one individual undergoing training, you would use the term "employees-in-training."