Niz started off with Atlético de Rafaela in 2006, remaining for nine years whilst scoring two goals in fifty-nine games; his last appearance came against Nueva Chicago on 7 June 2015.[1][2] During his time with Rafaela, he spent part of 2009 out on loan with Sportivo Rivadavia in Torneo Argentino C but failed to feature.[2] On 6 July 2015, Niz joined Sarmiento of the Argentine Primera División.[1] His Sarmiento debut arrived on 14 August versus Olimpo, which was his only appearance of the 2015 campaign for the club.[1] He subsequently scored two goals in the following two seasons across twenty-nine appearances.[1]
In June 2017, fellow Primera División side Tigre signed Niz following Sarmiento's relegation.[1][3] He featured in fourteen fixtures in his debut campaign of 2017–18.[1][4] Niz made the 100th appearance of his senior career in February 2018 versus Atlético Tucumán.[1]