Career
Born in Uberaba, Minas Gerais, Arnaldo moved to São Paulo at early age, after being spotted by a former player, Jorge Lima. He joined a youth setup in Bady Bassitt in 2010 before moving to Mirassol"s youth squads in the summer. As a forward, he was converted to a right-back during the process.
On 17 April 2011 Arnaldo made his first-team debut, coming on as a second-half substitute of a 0–3 loss at Botafogo-SP, for the Paulistão championship.
On 28 August 2012 he signed a new two-year deal with Leão. After being loaned to Rio Branco in the start of the 2013 season, Arnaldo joined América-Registered Nurse in the same predicament.
He returned to Mirassol at the end of the year, and after impressing while on the club in 2014, he joined Portuguesa on 23 April 2014. On 3 December, after appearing regularly for Lusa, Arnaldo moved to Penapolense, also in a temporary deal until May.
On 15 April 2015 he joined Criciúma, on loan until the end of the year.
