YHS has been working in the Sumba Barat Daya area since 2002, helping to meet the basic needs of the communities for water, education, health information and sustainable livelihoods.  It was officially established as an Indonesian charity on November 26, 2004.

YHS works with local governments, village governments, hospitals, schools, NGOs, community organizations, community and religious leaders, and especially with villagers.

In recognition of her dedication to the Sumba community, in October 2010, YHS founder Ann McCue was awarded the MBE (Member of the Most Excellent Order of the British Empire) by Her Majesty Queen Elizabeth for her humanitarian work for the people of Sumba.