Jacek Junosza Kisielewski studied Biology at the Adam Mickiewicz University in Poznań.

In 1978, he defended his doctoral thesis, and, in 1990, post-doctoral degree (habilitation) on Inland-water Gastrotricha from Brasil.

[7] Following his directoral post at the Consular Department, he was nominated Poland ambassador to Brazil, presenting his letter of credence on 13 February 2008.

Afterwards, he was back at the Department for Cooperation with Polish Diaspora and Poles Abroad, since 2014 as a director.

[7] In August 2016, he was nominated Poland ambassador to Portugal,[8] accredited to the president Marcelo Rebelo de Sousa on 19 October 2016.