The leader of the Twin Cities Soundz plays drums, trumpet, concertina and sings vocals. Peter got his start young in life performing in public at the age of seven, sitting in a set or two with his dad and uncle's band, the Mrozinski Brothers Aleatoric Ensemble. From 1991-1995, Peter played a multitude of instruments with the Polka Praise Band. Peter then began to organize his own group, while filling in with a variety of bands.

In the fall of 1999, The Twin Cities Soundz performed their first show, and have been evolving ever since.

Peter and his wife, Robyn, are the proud parents of one daughter, Amber. They are eagerly expecting another in March of 2006. Besides music, Peter enjoys spending quality time with his family, fishing, hobby farming, hunting, and most importantly, HAVING FUN!!

Robyn joined the Twin Cities Soundz in 1999, as the result of a convenient marriage arrangement. She plays bass, violin, piano, concertina and sings with the band. Robyn also writes original material for the group.

Robyn got her musical start by playing piano for her church at the age of nine. In 1993, she started playing bass guitar with John Filipczak and The Classics. In 1997, Robyn was crowned the United Polka Association Queen.

Robyn is a stay-at-home mom and enjoys sewing, quilting, fishing, ATV trips, horseback riding and spending time with her family.

Bernie Koslosky began performing at the age of 15 with a band he formed along with his brother, Randy. The band (under several different names) would eventually evolve into Energy in the late 1980's. Energy performed through 1995, performing throughout the East Coast and Mid-West. With Energy, Bernie recorded three albums; Get Energized, Pure Energy and Shine a Little Light. Energy received several awards including the International Polka Association Favorite Recording of 1993, and the highly coveted Stashamundo Award.

Since disbanding, Bernie has performed and filled in with various bands including Joe Oberitis, Frank Borzemowski's Rhythm and Sound, Lil' John and the ATM Band, John Stevens and Double Shot, Polka Family, Craig Ebel's DyVersaCo, Joe Glowacki and the Nord East Five and The Edel Band.

Since relocating from Pittsburgh to the Twin Cities area in February of 2005, Bernie has been performing with the Twin Cities Sounds.

Bernie and his wife Teresa are the parents of five children; Stanley, Owen, Phillip, Madeline and Anna. Bernie is the Plant Controller for a division of 3M Corporation located in Eagan, MN.

Craig plays concertina, bass, and sings with The Twin Cities Soundz. He got his start in polka music playing concertina with a number of bands, including Bill Czerniak, Polkatown Sound, Dr. Kielbasa, as well as countless others. Craig is known for his exceptional concertina playing and has been a member of the Twin Cities Soundz since 2001.

Dick joined The Twin Cities Soundz in 2004. He plays clarinet, sax, trumpet, drums, and every now and then, a background vocal or two. Dick is a veteran of the polka music scene in the Twin Cities area. He started out playing with the Polish Brass band back in the early days. He has worked with a number of bands throughout the years, including The Mrozinski Brothers Aleatoric Ensemble, John Filipczak and the Classics, Polka Choice, and many others.