With over 40 years of performance expertise, he has been teaching piano for more than 20 years. He has performed widely locally and internationally, in countries such as Mexico, USA, Hong Kong and Vietnam.
John has had the honour of performing for then Prime Minister Goh Chok Tong, as well as late Minister Mentor Lee Kuan Yew. He comes from a family of renowned musicians, including Jeremy Monterio and Claressa Monteiro. His late father was Emeritus Professor Ernest Steven Monteiro, Singapore's ambassador to the United States of America, Cambodia, Argentina and Brazil.
In 2007, he founded John Monteiro International Music School, which focuses on grooming students to perform in front of a live audience. Instruments taught include piano/keyboard, vocals, guitar and violin.
John’s passion for philanthropy can be seen in his keen involvement with Singapore’s needy. He has volunteered at the Singapore Association for the Visually Handicapped, and is a Board Member of the Rare Diseases Society of Singapore. His annual student recitals raise funds and increase social awareness for the three groups he supports passionately: the terminally ill, people with special needs, and those from broken homes.