Born in 1960 in Latvia. Graduated from the Latvian Academy of Music in 1984 (Trumpet class) and Prof.Vasily Sinaisky` Symphony orchestra conducting class in 1986.
Since 1977 conducting wind bands: conductor – assistant (1977-1990) and Artistic Director (1990-1992) of the Student Band of Latvia Technical University. First prizes in festivals – contests in Rostock, Gesecke, Augsburg (Germany), Neerpelt (Belgium), St. Pol Sur Mer (France).
Since 1995 Associated Professor at Jāzeps Vītols Latvian Academy of Music, Head of Wind Orchestra Conducting class. Artistic Director and Principal Conductor of the professional Wind Orchestra RIGA (1991-2007). Guest performances in Rostock (1993), Valencia (WASBE conference 1993), Wien (2000), Vilnius (1998), Moscow (2002).
One of the founders and conductor of the Youth Symphonic Band of Latvia since 1996. Prizes in festivals – contests in Rostock (1997), Zürich (1999), Seinajoki (Finland, 2000) and Kerkrade (The Netherlands, 2001, 2005), Schladming (Austria, 2006), Interlaken (Switzerland, 2007).
Jānis Puriņš` repertoire includes classical composers - W.A.Mozart and J.S.Bach, contemporary wind music composers - J.de Meij, P.Spark, A.Reed, J.van der Roost, Russian composers - M.Musorgsky, A.Borodin, A.Liadov, Latvian composers - J.Karlsons, R.Kalsons, M.Bašs, G.Ordelovskis etc..
Jānis Puriņš conducted student bands at Northern Iowa, Brigham Young and Omaha Universities (USA, 2002, 2003, 2008), as well bands in Sweden, Germany, Norway, Switzerland, Belgium, The Netherlands, Estonia and Lithuania. Collaborated with famous soloists James Gourley (tuba, United Kingdom), Reijer Dorrestejn (trumpet, The Netherlands), Wolfgang Bauer (trumpet, Germany), Steve Leisring and Leonard Candelaria (trumpet, USA), Igor Lešnik (percussion, Croatia) and lot of other.
Jury member during the Norwegian wind band competition (2004) and Estonian wind band competition (2006, 2007, 2008), Youth Music festival in Neerpelt (Belgium, 2007, 2009).
Founder of the Wind Ensemble of the University of Latvia (September, 2008) and Artistic Director of the International Trumpet Days 2006 and 2008 organized by Jāzeps Vītols Latvian Academy of Music.
Conductor of wind bands during the Latvian Song and Dance Festivals in 1990, 1995, 1998, 2003, 2008 and the Song Festival of the Nordic and Baltic countries in Riga.
President of the Latvian Association of Symphonic Bands.