St. Joseph’s Institution International (SJI International) is a non-profit, co-educational school with a proud Lasallian Catholic foundation, offering a holistic, values-driven, and international education in the heart of Singapore. Established in 2007, the school has grown into a vibrant community of over 2,200 students across its Preschool, Elementary, and High School, all united by a shared vision to learn, inspire and serve.

The High School, located on the Thomson campus, is a space where both Singaporean and international students from Grades 7 to 12 come together. Here, learning is as much about character as it is about curriculum. The community is built on the core values of Faith, Service, Community, Excellence, and Respect, which are woven into every aspect of school life. Nurturing teachers do more than just instruct; they create an environment where students feel safe, supported, and challenged to grow.

Students embark on a progressive academic journey that empowers them to become resilient and critical thinkers. From the IGCSE in Grades 9 and 10 to the internationally recognised IB Diploma Programme in Grades 11 and 12, the curriculum is designed to foster a deep curiosity for learning and prepare students for the future. Every student graduates with a WASC-accredited SJI International High School Diploma, a testament to their profound subject knowledge and essential future-ready skills.

Beyond academics, the school's commitment to "learning through service" is a cornerstone of the SJI International experience. Students are encouraged to look beyond themselves and serve the needs of others by supporting a wide range of charities and organisations. This approach not only promotes personal growth but also prepares students to become compassionate global citizens who make a positive impact on their communities.