Ronnie is a successful jazz drummer, he played with Dizzy Gillespie, Gerry Mulligan and Benny Carter, among others. He is an energetic and charismatic African-American who hails originally from Rhode Is. in the US but who has lived in Sweden since the 1960s.

A personal tragedy in 1980 made him decide to use his talent in a different way, one that could help others. Over a period of 13 years, he developed his practice method through extensive research and conversations with experts from the world of neuroscience.

In 2018 Ronnie, along with two of his Master Trainers, came to New Zealand for a series of workshops to launch the RGM movement. In his time here, Ronnie trained 30 practitioners in Kaitaia, Auckland, Christchurch & Dunedin.

Despite his advanced age (he was born in 1932), Ronnie still travels a lot, including training new RGM practitioners and giving workshops and lectures. He also regularly performs in Sweden with his own Ronnie Gardiner quartet and regularly with other jazz bands.