New Delhi: At ONGC, the Director (HR), Alka Mittal, has broken a glass ceiling of sorts by becoming the first full-time woman director on India's biggest oil and gas producer, ONGC's board. In a statement released by the oil public sector undertaking (PSU), Mittal, a post-graduate in economics, an MBA in HR management and a doctorate in commerce and business studies, took over as the Director (HR) of Oil and Natural Gas Corp (ONGC) on November 27.