The Head Girl from St Swithun's had the chance to travel to Geneva as one of three representatives of the UNICEF UK Youth Advisory Board (YAB).
Jamie was chosen by her peers on the board to represent the group at the meetings with the UN Committee on the Rights of the Child.
The meetings are a critical part of the UNCRC Periodic Review Process, during which the UK Government is reporting on how children's rights are respected in the United Kingdom.
Jamie said: "I am honoured and grateful for the opportunity to represent children's views across the UK and Jersey.
"I hope the UN Committee will consider our perspectives and make appropriate recommendations to the UK government."
Headmistress Jane Gandee said: "Since her arrival at St Swithun's, Jamie has been notable for her sense of community and for her concern for others.
"I cannot think of anyone better suited to represent the UNICEF UK Youth Advisory Board.
"I’m sure she was thoughtful and clear-thinking in her contributions."