Kellerman received a Grammy Award at the 57th Annual Grammy Awards[3] for his 2014 album Winds of Samsara, a collaboration with Indian composer and producer Ricky Kej. Winds of Samsara reached No. 1 on the US New Age Album Billboard Charts[4] and also peaked at No. 1 on the ZMR (Zone Music Reporter)[5] Top 100 Radio Airplay Chart in the month of July 2014.
Kellerman's Love Language (2015) received a Grammy nomination[6] for 'Best Contemporary Instrumental Album', and won a SAMA for 'Best Instrumental and/or Classical Album'.[7] It debuted at No. 1 on the World Music Billboard charts in July 2015.[8] This album also featured at No. 1 on the ZMR Top 100 International Radio Airplay Chart in August 2015,[9] and spent 11 weeks in the CMJ New World Top 40 Chart, peaking at No. 12.
His next project was a collaboration with the Soweto Gospel Choir, Symphonic Soweto – A Tribute to Nelson Mandela.[10] The album re-conceptualised traditional music, freedom songs (including Mandela favourite, “Lizalis’idinga”) and popular songs by South African legends (including Brenda Fassie, Lucky Dube and Miriam Makeba), from a symphonic and choral perspective – as part of honouring Nelson Mandela in the year he would have celebrated his 100th birthday. Symphonic Soweto won the 2018 SAMA for Best Adult Contemporary Album – Kellerman's seventh SAMA recognition.[11] From Symphonic Soweto, Kellerman's collaborative composition Soweto Travels won the USA Songwriting Competition for Best Instrumental Composition in 2017.
As part of his mission to work with and uplift children, Kellerman collaborated with the Ndlovu Youth Choir (a rural choir based in Moutse in the Limpopo province of South Africa) in 2018. Their African version of Ed Sheeran's Shape of You became an internet sensation, going viral with tens of millions of views on social media,[12] and winning awards like the HMMA (Hollywood Music in Media Awards) for 'Best Independent Music Video'[13] – pushing the Ndlovu Youth Choir firmly into the international limelight. This resulted in America's Got Talent scouting the choir to enter the 2019 competition. Ndlovu went ahead and delivered a sensational first few rounds, going all the way through to the finals of the competition, showcasing South African music and spirit in the process. Their collaboration is part of Kellerman's 2019 album In A Different Light[14], in which he re-imagines and re-shapes some of his favourite melodies by approaching them from a fresh angle.
Kellerman received his third Grammy nomination for Pangaea, his collaborative album with David Arkenstone in 2021[15] and his fourth Grammy nomination and his second win in 2023 for his song Bayethe, with South African artists Nomcebo Zikode and Zakes Bantwini in the Best Global Music Performance category.[16]
Kellerman was awarded an Honorary Doctorate of Art and Design from Tshwane University of Technology in October 2024.[17][18]
Performed at the Woodford Folk Festival in Australia in 2013/2014[33]
Performed at the Rajasthan International Folk Festival in Jodhpur, India in October 2015[34] and 2018[35]
Performed for the President of India in December 2015[36]
Performed in Johannesburg for the visiting Prime Minister of India, Narendra Modi and a television audience of more than 200 million people in June 2016.[37]
Performed in Kuwait at the Al Yarmouk Theater on 17 April 2019, at a show coordinated by the South African Embassy.[38]
Performed at the Dubai Expo in Dubai in October 2021, opening Heritage Week for South Africa.[39]
Performed as soloist with the South African Mzansi National Philharmonic Orchestra and conductor Marin Alsop in Johannesburg, Durban and Cape Town in December 2022[40]
Performed an intimate hour-long concert for 9 people only, which included the President of South Africa Cyril Ramaphosa, the President of China Xi Jinping, the Prime Minister of India Narendra Modi and President of Brazil Luiz Inácio Lula da Silva in August 2023.[41]
Performed at the BRICS Gala Dinner for 55 heads of state in August 2023.[42]
Kellerman has sponsored the living expenses of 10 children in the SOS Children's Village in Ennerdale, South Africa for the past 20 years and has also financed the building of a house in the SOS Children's Village in Rustenburg. For his continued efforts in helping give these children a better life, Kellerman was nominated by the SOS Children's Villages for the 2007 Inyathelo Special Recognition Award for Philanthropy.[43] He continues to facilitate the teaching of young dance and music students.
Kellerman provided the seed funding for the Keiskamma Music Academy in the Eastern Cape, founded by fellow flautist, Helen Vosloo.[44]
Wouter has worked closely and performs regularly with the charity 67 Blankets For Nelson Mandela.[45]
Kellerman recorded a song called 'Homeland' for Refugees awareness in March 2022[46] and performed on 10 December 2020 for the NPO Turquoise Harmony Institute to raise awareness of the plight of refugees[47]