Freddie McGregor has been variously a singer, musician

Musician

A musician is an artist who plays a musical instrument. It may or may not be the person's profession. Musicians can be classified by their roles in performing music and writing music.Also....* A person who makes music a profession....

 and producer

Record producer

A record producer is an individual working within the music industry, whose job is to oversee and manage the recording of an artist's music...

. According to Allmusic he is one of reggae

Reggae

Reggae is a music genre first developed in Jamaica in the late 1960s. While sometimes used in a broader sense to refer to most types of Jamaican music, the term reggae more properly denotes a particular music style that originated following on the development of ska and rocksteady.Reggae is based...

's most durable and soulful singers, with a steady career that started in the 1960s, when he was just seven years old.
In 1963 he joined with Ernest Wilson

Ernest Wilson (singer)

Ernest Wilson is a reggae singer who found fame as a member of The Clarendonians before working as a solo artist.-Biography:...

 and Peter Austin to form The Clarendonians

The Clarendonians

The Clarendonians were a ska and rocksteady vocal group from Jamaica, active from the mid to late 1960s.-History:The Clarendonians were originally Fitzroy "Ernest" Wilson and Peter Austin , the duo coming together in 1963 in their native Clarendon...

, and began to record for the Studio One label

Record label

In the music industry, a record label is a brand and a trademark associated with the marketing of music recordings and music videos. Most commonly, a record label is the company that manages such brands and trademarks, coordinates the production, manufacture, distribution, marketing and promotion,...

. McGregor worked with producer Niney the Observer

Niney the Observer

Winston Holness, better known as Niney the Observer , is a Jamaican record producer and singer who was a key figure in the creation of many classic reggae recordings dating from the 1970s and early 1980s....

 during the late 1970s and early 1980s.

In 1975, McGregor converted to Rastafari, which had a profound impact on his music.