He also earned an executive MBA diploma and attended a six-week advanced management program at Harvard Business School.

From June 2006 to the end of the fifth term of office of the Sejm, regardless of the turbulent changes in the coalition,[clarification needed] he served as chairperson of the parliamentary committee of economy, also as a member of the legislation committee, and the chairperson of the standing subcommittee of the constitutional tribunal.

Furthermore, he is a member of the programme Council of the magazine European Local Government Advisor (pol.

Europejski Doradca Samorządowy) covering practical information in field of raising EU funds for local governments and a member of the research council of the quarterly magazine Legal and economic overview (pol.

On 30 June 2016 he was appointed vice-president of the management board of PKO BP (from 4 July 2016), which resulted in the necessity to resign from parliamentary mandate.