Hi,
The assignment of hr roles and responsibilities amongst the 3 employees by the HR Dept. Head is subject to the company profile, its requirements and the qualification & relevant experience of the employees in question. However, in any company the basic hr functions include Recruitment, T&D, Performance Management, Compensation & Benefits Management, Employee Engagement, General Admin. and IR. Initially, one can allocate the responsibilities on the basis of above parameters, however, gradually job-rotation & job-enlargement can be done for individuals to maintain their job-satisfaction and to provide with opportunities of career growth, in turn benefitting the company in the form of competent multi-skilled employees.