Kusnierek is a graduate of Muskego High School and Marquette University. She has previously worked at WDJT-TV (2001-2002), FSN Pittsburgh (2003-2007), ABC Sports (2005), and FSN Wisconsin (2008), and as a reporter and former studio host for the MLB Network as well as some work for the Big Ten Network and the NFL Network. For one season, she worked with Kevin Harlan and Rich Gannon as a sideline reporter for Green Bay Packers preseason. From 2011 to 2013, she worked for WTMJ (AM) & ESPN 540 in Milwaukee as a sports reporter & talk show host. Kusnierek was hired by NBC Sports to work as a curling reporter during the 2014 and 2018 Winter Olympics, and also covered tennis for NBC Sports at the 2016 Summer Olympics. Kusnierek has also worked at WEEI-FM in Boston as a weekend and substitute program host.
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- Dougherty, Pete (January 14, 2014). "Catalon, Strader among 84 Olympic broadcasters for NBC". Times-Union. Retrieved February 15, 2014.
- Barton, Chris (February 12, 2018). "Sunday Conversation: NBC's curling reporter Trenni Kusnierek on the sport's cult appeal". Los Angeles Times. Retrieved February 23, 2018.
- Sorgi, Jay (August 22, 2016). "'It was amazing': Wrapping up Rio with WTMJ alum Trenni Kusnierek of NBC Sports". WTMJ.com. Retrieved February 23, 2018.
- Mark Gresbach (27 October 2013). "Change of Heart". YouTube. Retrieved 17 October 2017.
- Trenni Kusnierek (2017). "Trenni Kusnierek: Sports Anchor" (Interview). I Don't Want to be a Princess.
- Trenni Kusnierek (27 May 2013). "Sports Bank Flashback: Trenni Kusnierek Brewers Breakdown" (Interview). Interviewed by Paul M. Banks. The Sports Bank.net.