Alesandru was replaced with company employee Manuel Laurentiu Pirvu whose term is valid until April 8, 2017, Vulcan said in a statement Tuesday.
Alesandru took the company’s helm in December 2012.
Vulcan Bucuresti is owned by Romanian businessman Ovidiu Tender.
Alesandru has been placed under investigation by the Organized Crime Department alongside other 40 people, current and former employees within the Economy Ministry and natural gas producer Romgaz. The 40 people are accused of conspiracy and undermining of the national economy.