Michael J. Niesz, Kaukauna, age 63, died Tuesday, August 18, 2026. He was born in Kaukauna on March 15, 1963, to the late Joseph and Annette (Kross) Niesz. Michael loved golf, the Green Bay Packers, and the Milwaukee Brewers. He had a passion for automobiles and collecting sports memorabilia, especially the Packers, Brewers, and Bucks. When his kids were younger, Michael was involved in their sports and coached KGBA (Kaukauna Girls Basketball Association) and travel ball. He spent many years working at Gustmans as a service manager and ended his career working at Packerland Tire and Auto.

Michael is survived by his children: DJ (Elyse) Niesz of Appleton; Nichole (Adam) Hietpas of Little Chute; and Anna Niesz of Kaukauna; grandchildren: Eleyett Niesz, Makenna and Payton Hietpas; nephew, Joseph Niesz; and beloved dog, Oscar. He is further survived by other relatives and friends.

In addition to his parents, Michael was preceded in death by his brother, Andy Niesz.

No formal service is planned at this time.  A Celebration of Life will be announced in the near future.