Hillig founded THEnergy in 2013. THEnergy is a specialized business consultancy that focuses on innovation in the energy sector, such as microgrids, solar-diesel hybrid, energy storage and hydrogen. THEnergy has developed sophisticated tools to support its clients in product launches and growth strategies. During the last six years, THEnergy has consulted leading multinational utilities, oil and gas companies, and start-ups regarding energy strategy, due diligence, market intelligence, and communication. THEnergy combines Hillig’s previous experiences working at Alstom Power in conventional energy generation and at Innotech Solar. At the beginning of his career, Hillig consulted leading companies from the transport, telecommunication and construction sectors.