Aarsleff was appointed by Ørsted and ATP to support their bid for Denmark’s North Sea Energy Island (Energiø Nordsøen), an artificial offshore hub intended to collect and distribute large-scale offshore wind generation (initially 3 GW, with long-term potential up to 10 GW). The engagement formed part of the Ørsted-ATP consortium’s preparation for the expected tendering of the energy island and focused on bringing specialist offshore construction capability into the bid team. Within the consortium set-up, Aarsleff was designated to lead the construction work for the artificial island concept. The role was positioned as a major infrastructure and marine construction scope, drawing on Aarsleff’s experience with complex Nordic civil works, harbour expansions, and prior offshore wind foundation installation track record. The work described was tied to the island’s offshore build-out and associated heavy marine construction activities required to realise the hub concept in the North Sea. The role related to bid-stage mobilisation and planning in advance of procurement, supporting Ørsted and ATP’s proposal for delivering the world’s first artificial energy island and associated offshore infrastructure in Danish waters west of Jutland.