Arnaldi has been involved in construction throughout his life and one of his first endeavors was Sial Construcoes Civis, which is now known as Sial Engenharia. His biggest accomplishment to date is the establishment of the company Sial Engenharia.
In 2000, Arnaldi was elected as the moderator of the Western Parana Construction Company Industry Union. From 2003 to 2004, he was chair of the State Chamber of Civil Construction. This company was located in Curitiba.
He served as the Social Democratic Party’s State Treasurer in Parana from 2012 to 2013. In 2018, he was in the race for the Federal Deputy position in Parana. He won over 35,000 voters. Arnaldi had the chance to become a federal chamber substitute.
Arnaldi makes it a priority to come to work early every day. He loves to get a head start to the day, and believes this is a good influence on his employees. Arnaldi hopes to be a leader in his field. Other than working, he loves to spend his days working on new projects. He also enjoys learning about new things within his field. Just like work, Arnaldi makes his family a priority. He makes sure he takes the time to have lunch with his family during the week and weekends. Arnaldi says that if he had a chance to talk to his younger self, he would say to stay calmer and more relaxed. He says that this can be done by reading, traveling, or relaxing.