Recruitment refers to the process of attracting, screening, and selecting a qualified person for a job. All companies in any industry can benefit from contingency or retain professional recruiters or outsourcing the process to recruitment agencies. wikipedia.org

Employee engagement is the level to which an employee is absorbed by and enthusiastic about their work and so takes positive action to further the organization's reputation and interests. wikipedia.org

Onboarding, also known as organizational socialization, refers to the mechanism through which new employees acquire the necessary knowledge, skills, and behaviors to become effective organizational members and insiders.

The human resource consulting industry has emerged from management consulting and addresses human resource management tasks and decisions. HR Consultants can fill two typical roles (1) Expert Resource Consultant (2) Process/People consultant. wikipedia.org