In 1999–2000, she worked at TCH Systems SA, and then, until 2004, at Positive and ComputerLand, organizing the Management Competence Center.

In the years 2004–2007 she worked for HP Polska as a government affairs manager, dealing with international regulations, including the European Union.

[1] Kalinowska-Iszkowska has been a member of the Polish Information Technology Society (PTI) since 1981, serving on the organization's board from 2000 to 2011.

From 2005 to 2011, she represented PTI in the Council of European Professional Informatics Societies [it] (CEPIS),[2] where she also served as vice-president from 2008 to 2011.

From 2017 she was a member of the management board of the Mazowieckie Branch of the Polish Information Technology Society (Polskie Towarzystwo Informatyczne [pl] PTI).