Haroldo Jacobovicz began his professional journey with seven years at Military College followed by four and a half years studying Civil Engineering at the Federal University of Paraná. Despite his engineering background and family lineage—both parents were civil engineers—he shifted his focus toward information technology during the 1980s. This decision marked the start of a career spanning multiple technology ventures across software, hardware services, telecommunications, and computer virtualization.

Born as the eldest of four siblings to Alfredo, a university professor and civil engineer, and Sarita, the seventh female civil engineer in Paraná, Haroldo Jacobovicz appeared destined for traditional engineering work. However, his interests drew him toward emerging technologies and untested markets. Before completing his degree, he partnered with three computer-skilled friends to establish Microsystem, targeting inventory control and cash register automation for retail businesses. The venture closed after two years when the market proved unprepared for such computerization.

Following this initial setback, Haroldo Jacobovicz joined Esso (now Exxon Mobil Corporation) after being selected from over 200 engineering candidates. He progressed rapidly from reserve salesman to market analyst for the southern region, eventually reaching a position handling commercial tactics and new business at the company’s Brazilian headquarters in Rio de Janeiro. His responsibilities centered on computer-processed data analysis. The Cruzado Plan’s fuel price freeze, combined with separation from family, prompted his departure to accept an advisory role with the Technical Director at Itaipu Hydroelectric Plant.

After four years in the public sector, he returned to private entrepreneurship by founding Minauro, a computer rental and maintenance company. The business model offered four-year contracts with machine replacements every 18 months, including maintenance services. This approach proved successful with public agencies across southern and southeastern Brazil. The company later expanded into software solutions through acquisitions of Consult, Perform, and Sisteplan, evolving into the e-Governe Group, which continues serving Brazilian municipalities with IT management systems.

In 2010, Haroldo Jacobovicz established Horizons Telecom to serve the corporate market, building the operation with electrical engineer Renato Guerreiro, who served as Anatel’s first president. The telecommunications company developed into a recognized corporate provider before being acquired by an investment group in early 2021.

Following the telecommunications sale, he founded Arlequim Technologies with a focus on computer virtualization services. The company aims to enhance computing performance on older equipment through cloud-based solutions, serving corporate clients, public sector organizations, and individual consumers, particularly gaming enthusiasts. This approach allows users to achieve modern computing capabilities without purchasing new hardware.

Throughout his career path, timing and market readiness have influenced business outcomes. His first venture closure taught lessons about scalability, cash flow management, and technology maturity that informed subsequent enterprises. His approach combines infrastructure development with broader considerations of accessibility and practical application across different market segments.