Marshall was exposed to music from an early age, becoming familiar with the piano at the age of three, and starting full-fledged lessons a few years later.
From 1971-1979 he studied at the Chethams School of Music in Manchester. Afterwards, he won a scholarship to study at the Royal College of Music in London and was an organ scholar at St George's Chapel at Windsor Castle. In 1983-1984, he went on to graduate school at the University of Music and Performing Arts Vienna.
With these forays into the music world, gaining experience in a variety of genres, including church music and jazz, he soon decided to turn professional as an organ and piano soloist. The first recording was released on EMI in 1990 using the organ of Coventry Cathedral.
It was also during this period that he found a foothold that would later lead him to perform with world-famous orchestras as a conductor. Thus, I became accustomed to conducting and directing on the podium as well as performing as a soloist. He has truly become a person with two talents, a person who is, so to speak, a legacy.
He has made numerous recording appearances and has conducted prestigious opera houses in Washington, Dallas, Montreal, Paris (Opéra-Comique), Rome and Dresden (Semper Opera).
In 2016, he was invited as a guest conductor by the Royal Scottish Orchestra, the Taipei City Symphony Orchestra and the Malaysian Philharmonic Orchestra, and performed as an organist at the Ten Pieces at the BBC Proms (Royal Albert Hall).
He played many BBC Proms before 2016 and was one of the guest presenters at the 2014 Barenboim Proms.
His achievements don't stop there. In 1998 he was named the BBC Music Magazine of the Year and in 2004 he was awarded an honorary doctorate from Bournemouth University. In 2010 he was made a Fellow of the Royal College of Music and in 2016 he was awarded the prestigious Golden Jubilee Award for his musical endeavors.
A noteworthy recording is that the piano album "A Gershwin Songbook & improvisations" won the German Echo Prize.
As his busy schedule suggests, Marshall never rests on his career. A highly sought-after conductor, he has been particularly active as Principal Guest Conductor of the Cologne WDR Symphony Orchestra, and has also performed with the Leipzig Gewandhausorchester, the Czech Philharmonic Orchestra, and the Vienna Symphony Orchestra.
One of the most highly anticipated projects in 2018 was conducting a mass by Leonard Bernstein with the Orchester de Paris. Bernstein's interpretation of the music was Marshall's forte, and therefore the performance received much attention.
In addition to these conducting activities, he has toured the world as a concert organist, performing at the Moscow International Music Hall, the Lotte Concert Hall (Korea), and the Davis Symphony Hall (California).