Johnson was immersed at a very young age in various musical environments: Rock’N'Roll, Blues, Funk, R&B and of course Jazz.
Johnson began studying piano at age 15 and bass at age 18.
He started composing and performing professionally at age 20, when Integrity Music signed him as part of Award winning band Vertical.
After touring with Vertical around the world for 4 years, he quickly moved from playing pop and rock to jazz, gospel and R&B.
In 2006 Johnson was part of the production team of Grammy Award nominee producer/drummer Alvaro Lopez and at the same time was the bass player for Lopez's Resq Band.
As part of Resq Band he traveled around Latin America for almost 2 years, in which he was part of many master recordings alongside world class musicians such as: Abraham Laboriel, Michael Landau, Luis Conte and many others.
In 2010, Johnson began focusing on the production side of music and since then he has become a highly respected producer as well.
Johnson recently released his first instrumental album called "Bass&Beyond".
The album has many special guests such as: Nikki Glaspie (Beyonce, Jay-Z, Kanye West), Alvaro Lopez (Abraham Laboriel, Resq Band) and Eric Boseman (Brian Mcknight, Whitney Houston), and many other top musicians.
The album was produced, composed, arranged and mixed by Leslie Johnson himself.
He has been part of many professional albums as a bassist, producer and/or multi-instrumentalist and when he is not touring with different artists or producing different projects, he is traveling around the world giving clinics and seminars about playing, composing and producing.