Dominik Holec grew up in Žilina. He was on loan in Slovak clubs, for example in Senica or Zlaté Moravce. In the season 2018/2019, he became the number one in Žilina. After the end of the contract, he came to Sparta as a free agent before the start of the 2020/21 season. He was on loan in Raków during the spring part of the season.