Leeflang has recorded drums for many artists, including Anneke van Giersbergen, Tiffany Giardina, Ted Poley, Angus Clark and Russian pop star Zemfira. He has worked with producers such as Ken Caillat, Mikal Blue, PJ Bianco, Nick Sansano and Easy Mo Bee. In the summer of 2009, Leeflang toured with Lita Ford in Europe and the US as part of her come-back tour after a 16-year hiatus from the music industry. In late 2015, he toured with Dilana. He is currently the drummer for country artist Liam Mogan.