Born in Poznań, for 10 years has been a choir singer and soloist of Poznański Chór Chłopięcy [ang. The Poznań Boys' Choir] of Jerzy Kurczewski. He graduated from the Catholic University of Lublin - the faculty of musicology, the Postgraduate Conducting Course at the Academy of Music in Bydgoszcz and the Faculty of Singing and Acting at the Academy of Music in Poznań (honors degree in the class of prof. Ewa Wdowicka).
In 1990, he received a scholarship from the Mozart Society and the Mozarteum Academy in Salzburg where he studied the interpretation of Mozart music under the supervision of prof. E. Häfliger and E. Tappa.
Wojciech Maciejowski is a laureate of three prizes at the Ada Sari Vocal Artistry Competition (1988), and the 1st prize at the Moniuszko Competition in Warsaw (1989). Since 1988, he has been cooperating with opera theatres in Poland (Poznań, Bytom, Kraków, Łódź and Szczecin) and abroad (Brussels, Antwerp, Munich, Salzburg, Frankfurt a/Main, Prague and Bern). He has also performed during well-known festivals, such as in Łańcut, Kudowa, Brighton, Tokyo, Prague (the Prague Spring), Vienna (Wiener Klassik) and Salzburg (Mozartwocke). Maciejowski cooperated with such well-known conductors as: Gerd Albrecht, Sylvan Camberling, Silvio Varviso, Hans Zender, Bernard Heitink, Stefan Stuligrosz, Tomasz Bugaj, Wojciech Michniewski, Tadeusz Wojciechowski and Jerzy Salwarowski. His accomplishments encompass numerous radio, television and CD recordings in Poland, Czech Republic, Germany, Belgium, Austria and the United States.
From 1999 to 2002, he held the function of the artistic director of the Music Days “Viva la Musica” Festival in Świnoujście.
Since 1996 he has been a solo singing teacher at the Academy of Music in Poznań. In 2003, he received a post-doctoral degree (Polish: doktor habilitowany) in arts by the Academy of Music in Warsaw. In 2010, he was awarded the title of the professor of music by the President of the Republic of Poland. Since 2008 till 2015, he was the Dean of the faculty of Vocal Arts of the Academy of Music in Poznań. He conducts master vocal classes and is a juror in international competitions.