He was the creator and main shareholder of Europejski Fundusz Leasingowy (European Leasing Fund) which he set up in 1991.

In 2002-2003, he was the CEO and managing director responsible for leasing and insurance at Credit Agricole Poland.

In place of the demolished building, Czarnecki, along with the investor LC Corp, built Sky Tower.

Banks Insurance TU Europa (sold to Talanx in 2011) Leasing Financial brokerage Real estate Other companies He is the author of five books: In 1998, Leszek Czarnecki was granted the Wall Street Journal award for the Best CEO in Central Europe, as one of the 10 renowned businessmen in the region.

In the same year, he also won the global finals of the Young Business Achiever, a contest that is held in Beijing.

In October 2004, Leszek Czarnecki joined the honorary members of the Polish Association of Lease Companies, and in November he was included in the group of four individuals recognised as Entrepreneur of the Year from Eastern Europe by INSEAD, one of the best business universities in Europe, and the French Minister of Finance.

In September 2005, he received the prestigious Lesław Paga award honouring his achievements and personal contribution to the development of the financial services market in Poland.

In November 2009, Leszek Czarnecki was recognised in the Entrepreneur of the Year contest organised by Ernst & Young and received an honorary award for employing new staff in times of deep economic crisis.

The same month, Puls Biznesu nominated him for the title of the Entrepreneur of the Twenty-Year Independence Period.

In 2014, Leszek Czarnecki was recognised by the editorial team of the WSE magazine GG Parkiet as the man of the capital market on the 25th anniversary of the democratic changes in Poland.

The Oxford Programme's founders and affiliates are Timothy Garton Ash, Norman Davies, Margaret MacMillan.