Entrepreneur and Businessman Edenilso Rossi Arnaldi

Edenilso Rossi Arnaldi is CEO and founder of Sial Engenharia. It is one of Brazil’s most significant engineering companies. He remains active in all operational and development aspects of the business. This includes building construction, company expansion as well as public infrastructure, and more. Arnaldi is dedicated to the improvement and evolution of capital investment in different areas of Brazil.

Early Years

Arnaldi was born on July 27, 1962. His mother was a teacher and his father was a truck driver. He grew up in Paranavaí (PR). When he was 17, his family moved 70 kilometers away to the city of Paraná, Maringá. Arnaldi’s goal at that time was to work, continue his education, and become a student of higher education.


His professional career began as he worked for Banco Bradesco. He worked in civil construction specializing in cement technology applications. Arnaldi built a reputation for being able to use this knowledge with large-scale construction projects. It became his main interest as he developed a passion for the industry.


Arnaldi purchased a construction company in 1990. He worked to expand his business and then moved it to the city of Cascavel. The name of the business was Sial Construções Civis. Arnaldi officially started this business on November 27, 1991. His goal was to enter the public works sector. Arnaldi’s company worked with local communities managing small sanitation-based contracts. He was successful and soon developed a good reputation. Arnaldi’s company steadily grew in scope. He began to develop important relationships with many leaders in the industry. 

Public Housing

Arnaldi’s company Sial soon began taking contracts concerning security, public housing, mobility as well as sanitation. The company built spaces for public use, detention centers, hospitals, and more. Arnaldi’s company was recognized on a national level for its ability to complete projects that met community needs as well as creating job growth for the long-term. Arnaldi moved his company’s headquarters to Curitiba. This was done to continue the company’s rapid expansion. The company’s name was changed in 2010 to Sial Construções & Engenharia. This was done to further emphasize the company’s ability to handle a wide range of construction projects. In 2017, the company was again renamed Sial Engenharia.

Laguardia Empreendimentos

Arnaldi displayed his unique view of the real estate industry by expanding his business group. He created Laguardia Empreendimentos. The focus of this company is real estate development as well as construction. It is dedicated to serving medium-sized as well as small public works.

Personal Life

Edenilso Rossi Arnaldi has been married to Fabíola Guimarães Arnaldi for 31 years. They met when Arnaldi worked at Banco Bradesco. The couple has four children. Arnaldi also has four brothers.

Arnaldi’s business has become part of a list of construction companies that are responsible for the important construction projects occurring in Paraná. They are also part of the important works that have taken place in Rio de Janeiro, São Paulo, Santa Catarina, and others. Arnaldi supports the recent growth in civil construction taking place in Brazil as well as the country’s continuing increase in development.