A composer and academic teacher, he was born 20.10.1957 in Jasienica near Bielsko-Biała. He studied composition under Józef Świder at the Katowice Musical Academy and graduated with distinction in 1986. Then he was accepted a scholarship grantee of the government of Austria and the Alban Berg Foundation and between 1990 and 1992 studied the composition under Francis Burt at the Hochschule für Musik und darstellende Kunst in Wien. He was also awarded with multiple scholarships by the Polish Ministry of Culture and Art, by the Polish Society of Authors and Composers and by the voivode of Katowice. He partook in many master courses on composition e.g., in Kazimierz nad Wisłą, Wien, Darmstadt and Borowiec.

Music by Andrzej Dziadek has entered the repertoire of the most prestigious concert halls in Europe, Asia and North America. Its new interpretations are still recorded for the radio and TV. Its beauty and significance was best appreciated in 1991 when the world premiere of  his Nocturne for Chamber Orchestra took place in the Carnegie Hall.

Among his best known compositions are:

• Prelude and Toccata for Piano
• Sinfonietta for Orchestra
• Poema for Orchestra
• The Symphony No.1 (1996-97) — that composition was compulsory for the contestants at the VI International Contest for Conductors named after Grzegorz Fitelberg (Katowice, 1999).   

The compositions by Andrzej Dziadek have been performed at multiple festivals of contemporary music in Poland such as:

• Warsaw Autumn,
• Poznań Musical Spring,
•  Polish Contemporary Music Festival in Wrocław,
• The Young Composers’ Meetings in Gdańsk ‘Droga’,
• The International Organ and Chamber Music Seminar in Legnica,
• Musica Moderna in Łódź,
• Music Days for Cracow Composers
• The Festival of World Premieres ‘The Most Contemporary Polish Music”  

His music has found a numerous audience at the festivals abroad, for instance at the :

• Capital Music Festival XI in New Jersey, USA.
• Edmonton New Music Festival, Canada.
• Yougnam International Contemporary Music Festival in Taegu, South Korea.
• International Contemporary Music Festival in Budapest, Hungary.
• Jornadas de Musica Contemporanea in Cordoba, Spain.
• Excelsis VII in Visby, Sweden.

Between 1993 and 2011 Andrzej Dziadek was the head of the branch of the Polish Composers Union in Katowice. Between 2001 and 2009 he was also the member of the central board of the Polish Composers Union. The art director of The International Festival ‘Silesian Days of Contemporary Music’ (1994-2010), he coordinated the series of concerts ‘The Silesian Tribune of Composers’, published many scholarly books and musical albums and was a member of the jury at multiple contests for composers. In 2007 he became a resident composer in the International Centre for Composers in Visby, Sweden. Nowadays, he is the head of the branch of the Polish Composers Union in Gdańsk and a professor teaching composition at the Gdańsk Music Academy. In 2013 he established The Sinfonietta Pomerania.