Competitive bids are invited to undertake construction and testing works required for the expansion of 230/138 kV substations in Progreso and Toncontin under the Inter American development Bank (IaDB)-funded Apoyo a la Integración de Honduras en el Mercado Eléctrico Regional y al Acceso de la Energía Renovable a la Red or Support for the Integration of Honduras in the Regional Electric Market and the Access of Renewable Energy to the Network.