Benghea-Malaies has replaced Marius Ion Mateescu in the position.
The ministry also named Gabriel Gheorghe as Board Chairman of the company, replacing Mircea Ciopraga.
Benghea-Malaies has worked since 2007 as strategic management consultant with Mckinsey&Company, handling projects in energy, industry, retail and FMCG (fast-moving consumer goods).
Previously, he filled in various public positions at the Finance Ministry, as well as state-run rail company CFR and the National Lottery.
Gabriel Gheorghe previously worked with the Financial Guard and the fiscal authority ANAF.
The ministry owns 58.69% in Transelectrica, while investment fund Fondul Proprietatea holds a 13.5% stake.
Under a EUR3.6 billion loan agreement with the International Monetary Fund, Romania has pledged to replace the management of state-run companies with private managers.