Denys Ponomarenko was born on February 27, 1986. In 2008 received a master's degree in law with honors from Odesa National Law Academy (today - National University "Odesa Law Academy"). Since 2018, it has become graduate student of the Department of Criminal Procedure of the National University "Odesa Law Academy". Already in 2006-2007 years worked at the law firm "Yurline".

In 2007, he organized and co-founded a law firm of the firm "Prime Juris". In 2010, he took the exam and received it a certificate of the right to engage in advocacy. In 2016, he organized and became a co-founder of the bar Association "Ponomarenko and Partners".

Since the beginning of 2017, he became a partner of the law firm association "Barristers".