Dariusz Jellonnek graduated from Gdynia Maritime University in 1992. He worked as an officer on dry cargo vessels until 1998, and then as Master on Stephenson Clarke Shipping vessels until 2013. In 2013 Dariusz joined V.Ships, at first as Quality Manager & Training Superintendent and then from 2015 as General Manager for V.Ships Poland. He later worked for Polferries as Crew Director and (from July 2023) as Head of Training Fleet and onboard Training Department in Maritime University Gdynia.

Dariusz is President of the Polish Shipping Company Association (PZPZ), having been involved from its inception.