After HPCL, the government headhunter struggled to find a suitable candidate for the top job at Bharat Petroleum, as most applicants were narrow specialists lacking multidisciplinary experience needed to run a large organisation.The Public Enterprise Selection Board (PESB) last month interviewed a dozen candidates including BPCL director (finance) Vetsa Ramakrishna Gupta and its director (refineries) S Khanna but found none suitable for the job of chairman and managing director of Bharat Petroleum Corporation Ltd (BPCL), according to a PESB order.