In 1981, he continued his studies at the Royal College of Music, where he primarily worked with Joyce Rathbone, but also studied with Geoffrey Parsons, that paragon among all other post-Moore accompanists. Engaged as an accompanist for the Walther Grüner International Lieder Competition, Martineau was himself a winner, having been chosen as best accompanist. He played for the winner of the lieder award at the Cardiff Singer of the World Competition in 1989 and that event turned out to be unexpectedly fortuitous: the first-place singer was Terfel and the two artists would subsequently appear together often with the international spotlight trained on them.
The following year, he was an accompaniest at the Elly Ameling Competition, once again working with the winning artist. At the Britten-Pears School at Aldeburgh, Martineau has accompanied in master classes given by such luminaries as Elisabeth Schwarzkopf, Suzanne Danco, Joan Sutherland, Kurt Equiluz, and Ileana Cotrubas. Under his own name, he has presented two important series on song. At St. John's Smith Square in London, he offered a series on the complete songs of Debussy and Poulenc and at London's venerable Wigmore Hall, he conducted a series devoted to Benjamin Britten's vocal works. Both series were broadcast by the BBC. Martineau has, in addition to appearing at many of the most important British festivals, performed at the Salzburg, Vienna, and Aix-en-Provence festivals as well as on tours throughout North and South America.
Recitals have taken him to most major European cities, Amsterdam, Paris, Munich, Berlin, and Milan among them. The list of singers for whom he has provided accompaniment is extensive and multinational: Dame Janet Baker, Felicity Lott, Sir Thomas Allen, Sarah Walker, Frederica von Stade, Tom Krause, Amanda Roocroft, Barbara Bonney, Anne-Sofie von Otter, John Mark Ainsley, Susan Graham, Joan Rodgers, Della Jones, Olaf Bär, Karita Mattila, and Simon Keenlyside among them. In addition, his performances with instrumentalists are equally convincing. He has collaborated with clarinetist Emma Johnson in both live performance and recording.
Examples of Martineau's flexibility in recorded performance may be found in his work with such different artists as Susan Graham and Terfel. With Graham, the accompanist recorded a recital of songs by Ned Rorem, an American composer with high regard for both French elegance and American simplicity. With Graham's luminous singing and direct diction, Martineau offers exemplary interplay, neither overstated nor too acquiescent. For the far more extroverted Terfel, Martineau is ever responsive to the broad dynamics favored by the singer. In discs devoted to Schubert lieder, English songs, Schumann's Liederkreis, Op. 39, and Ballads and Romances, he supports his singer's vivid interpretations, often finding real magic, especially in the disc devoted to English song. Read less