Hermes Engineering Company Limited Hermes Engineering Company Limited "Hermes" is a Limited Liability Company incorporated under the company and allied Matters, CAP20, of the Federal Republic of Nigeria in 2012. The company aims at becoming the leading provider of Facility Management, Operations and Maintenance (O&M) services to the power industry. The O&M services to include Plant Maintenance, Facility Management, Operations Support, Asset Performance Management and Evaluation, Operations Readiness, Start-up and Commissioning, Inventory Management, Small Capital Project Design and Construction..