Mats is a highly in-demand musician and plays in a number of different bands and constellations in Norway and internationally, such as the Tord Gustavsen Ensemble (ECM) the Source (ECM) with Trygve Seim, Øyvind Brække, Per Oddvar Johansen, drums, dutch pianist Wolfert Brederode Quartet (ECM) Parish (ECM) with Fredrik Ljungkvist (S), Bobo Stenson (S) and Thomas Strønen.
He has also released 6 CDs in his own name, the latest one being Mats Eilertsen `SkyDive'on norwegian label Hubromusic. `SkyDive`features Tore Brunborg, sax, Thomas T. Dahl, guitar, Alexi Tuomarila, piano, Olavi Louhivuori, drums.
Mats is one of the finest and most distinct bass players on the Norwegian jazz scene of today. He has a special warm and lyrical way of treating the bass, being steady and experimental at the same time, bringing it all together and yet showing openness, willingness, and constantly searching for new sounds.
He has participated on many recordings with among others Solveig Slettahjell, The Source, Tord Gustavsen, Parish, Sonny Simmons, Kornstad trio, Food, Dingobats, Håvard Wiik trio.
He has also had the opportunity of performing with artists such as Pat Metheney, Joshua Redman, Lee Konitz, Bobo Stenson, Kenny Wheeler, Tomasz Stanko, Yuri Honing.