Include industry-relevant certifications.
Many organizations help you validate your purchasing management skills. Some of the most relevant institutions are the Institute for Public Procurement, American Production and Inventory Control Society (APICS), The Institute for Supply Management (ISM), and the American Purchasing Society. They validate your competencies in social responsibility, supplier relationships, and cost/price management. To validate these skills they usually perform a written and oral exam. However, the requirements will vary depending on the organization. If you have any certification, such as the Certified Professional in Supply Management (CPSM), you should include it in your resume. This will help you look more reliable and experienced.