Prior to co-founding Bastion Group, Maciej was a Partner of ESO Capital, a USD 500 million fund based in London, where he was responsible for investments in Central and Eastern Europe. Previously, he was an Executive Director at D. B. Zwirn (Highbridge) in London, a USD 5 billion alternative credit fund. Maciej has worked in investment banking at Credit Suisse in London and Lazard in New York. He began his career at PriceWaterhouse and McKinsey in Warsaw.
 
Maciej holds an MBA from Harvard Business School and a BA in Economics with Honors and Distinction from Stanford University.

He is fluent in English and Polish and has a working knowledge of German and Russian.