During the due diligence phase, the Chief of Staff (CoS) is often the one who coordinates the work between internal teams and external advisors. The CoS is responsible for collecting, validating, and structuring all relevant information about the acquired company, including financial data, legal agreements, HR issues, and cultural aspects. The CoS ensures that risks and opportunities are identified and communicated to management, as well as that the due diligence process is comprehensive and effective. In Swedish companies, it is particularly important to also include issues related to labor law, MBL, and union relations in the due diligence, as these can affect the integration plan and the future work environment. The CoS acts as a link between different functions and ensures that all perspectives are considered, reducing the risk of surprises after the transaction. By working structuredly and transparently, the CoS contributes to creating security and trust throughout the process.