The Washington Letter Agreement, also known as the Washington Accord, is an international agreement that outlines mutual recognition of engineering education accreditation systems. It focuses on recognizing the substantial equivalence of engineering programs accredited by signatory countries. This agreement facilitates the mobility and global recognition of professional engineers. The Washington Letter Agreement was first signed in 1989, and its main objective is to establish criteria and guidelines for accreditation systems to ensure high-quality engineering education globally. Its purpose is to promote the mobility and employability of engineers by creating a framework for the mutual recognition of accredited engineering programs. The agreement aims to encourage signatory countries to develop and maintain strong accreditation systems that meet certain quality standards. It emphasizes the importance of outcome-based education, continuous improvement, and the development of lifelong learning skills for engineers. Under the Washington Letter Agreement, the accreditation systems of signatory countries are evaluated and recognized by other member countries. This means that an engineering program accredited by a signatory country is recognized as substantially equivalent and meets the academic requirements for engineering practice in other member countries. There are various types of Washington Letter Agreements, including bilateral and multilateral agreements. Bilateral agreements establish mutual recognition between two signatory countries, allowing the accredited engineering programs from each country to be recognized in the other. Multilateral agreements involve multiple signatory countries, establishing a broader recognition framework. The Washington Accord has been signed by numerous countries, including Australia, Canada, China, India, Japan, South Korea, the United Kingdom, and the United States, among others. By signing this agreement, countries demonstrate their commitment to maintaining high standards of engineering education, promoting global mobility for engineers, and enhancing the global recognition of their engineering programs. In conclusion, the Washington Letter Agreement is an international agreement that ensures the mutual recognition of engineering education accreditation systems. It aims to promote the global mobility and employability of professional engineers by establishing criteria and guidelines for high-quality engineering education. The agreement has different types, including bilateral and multilateral agreements, which facilitate the recognition of accredited engineering programs between signatory countries.