He graduated cum laude from the Academy of Music in Katowice, where he studied Conducting with Karol Stryja. In 1993, thanks to a scholarship from the American Society for Polish Music, he mastered his conducting skills in Los Angeles. In the years 1984-1986 he conducted an ensemble consisting of musicians from the Katowice-based Polish Radio and Television Grand Symphony Orchestra during the festivals Warsaw Autumn and the Silesian Days of Contemporary Music.  In 1986 he was appointed Artistic Director of the State Symphony Orchestra in Zabrze, and in 1990 General and Artistic Director of the State Philharmonic in Białystok, with which he toured the USA (1995; Carnegie Hall, among other locations). For two seasons he was General and Artistic Director of the Poznań Philharmonic (1996). Since 1998 ? Artistic Director of the Henryk Mikołaj Górecki Silesian Philharmonic, and since 1999 ? Artistic Director and Juror of the Grzegorz Fitelberg International Competitions for Conductors in Katowice. Member of the Artistic Board ? Artistic Coordinator of the Polish Orchestra Sinfonia Iuventus.

In the years 1999-2002 he was the main conductor of the International Piano Competition in Porto (Portugal), and in 2003 – a juror and conductor in the International Piano Competition in Morocco. Two years later he was appointed Artistic Director of the 2^nd International Violin Competition in Toruń, a position he also held in 2013; he was a juror in the 3^rd and 4^th edition of the competition in Toruń (2013, 2016), as well. In 2011 he took the position of the Chairman of the 8^th W. Lutosławski International Cello Competition in Warsaw. He was the Chairman of the Jury at the 6^th All-Poland?s Competition for Young Conductors in Białystok (2016). He gives concerts on all stages in Poland, headed by the National Philharmonic, and abroad (e.g. Albania, Austria, Belarus, China, Czech Republic, France, Spain, Ireland, Japan, Canada, South Korea, Lithuania, Latvia, Morocco, Mexico, Germany, Portugal, Slovakia, Slovenia, Sweden, Tunisia, Ukraine, USA). He has recorded several dozen albums with the Silesian Philharmonic ensembles. Górecki. Mikołaj/Henryk Mikołaj (DUX 0924) was nominated to the Fryderyk 2013 award. He can boast of many premieres. The Silesian Philharmonic musicians under his baton were Poland?s first performers of Symphony No. 4 Tansman Episodes by Henryk Mikołaj Górecki, completing a cycle of the world premieres of this piece (2014/2015 London ?Los Angeles ? Amsterdam ? Łódź/Katowice). In 2016 this rendition, the world?s second, was released on a CD. In 2017 an album with Symphony No. 2 Copernican by H.M. Górecki conducted by Mirosław Jacek Błaszczyk was released.

Mirosław Jacek Błaszczyk has received the Award of the Mayor of Katowice in the field of culture for promoting Polish music, with special emphasis on the contemporary music, and for the achievements of the Silesian Philharmonic musicians under his baton. He has also received a similar award from the Mayor of Rybnik. He is the head of the Chair of Symphonic and Opera Conducting in the Academy of Music in Katowice. In 2012 the President of the Republic of Poland granted the artist with a title of Professor of Musical Arts.