Jacek is qualified in Poland as a legal advisor. He studied law at the University of Łódź in Poland and the University of Utrecht in the Netherlands. He also completed postgraduate studies on European funds at the University of Lodz and International Business and Trade Law Program organized by Catholic University of America, Columbus School of Law in Washington in cooperation with Jagiellonian University in Cracow and the Catholic University of America.
He started his professional career with the State Fund for Rehabilitation of Disabled Persons in 2002. Then he moved to the Ministry of Finance in 2004 and worked there for several years. Later, he worked for several domestic and foreign companies, in particular companies from Foxconn and Leiber Group. In 2010, he established his own law firm ― Cieślak Klimkowski Attorneys at Law ― together with Beata Cieślak.
During his career, he has provided legal services to a number of domestic and international clients concerning tax law, commercial law, corporate matters and dispute resolution. His main achievements include: