UNICEF is mandated by the United Nations General Assembly to advocate for the protection of children's rights, to help meet their basic needs and to expand their opportunities to reach their full potential.  UNICEF works in some of the world’s toughest places, to reach the world’s most disadvantaged children. Across 190 countries and territories, UNICEF works for every child, everywhere, every day, to build a better world for everyone.   With a fundamental mission to promote the rights of every child, everywhere, UNICEF is and has always been committed to saving lives of children and their mothers and to generating evidence to promote this work.   In 2020, the Government of Greece and UNICEF announced the establishment of UNICEF's official presence in the country. UNICEF’s County Office in Greece, in cooperation with national stakeholders, has signed a 5-year (2022-2026) County Programme Document (CPD), which includes national goals for children and youth in terms of education, health, social protection, justice and youth employment.   The purpose of this Request for Proposal for Services (RFPS) is to identify and establish non-exclusive Long-Term Agreements (LTAs) with vendors that have the skills and expertise to assist UNICEF GCO in UNICEF Greece Country Office (GCO) with the Design and Development of Web-based solutions for Greece CO