This article discusses the challenges faced by HR managers in mergers and acquisitions, the effects of sexual harassment behaviors, and the advantages of filling positions with current employees. It explains how mergers and acquisitions can be an effective strategy for companies, but HR managers have to face challenges such as communication, deciding HR policies, and retaining talented people. It also discusses the negative effects of sexual harassment behaviors on the organization and how it can be identified and avoided. Finally, it explains the advantages of filling positions with current employees, such as cost-effectiveness and better results. The subject of the article is Human Resource Management, and the references are included.