The European data center market is rapidly evolving, driven by rising demand for capacity and stricter sustainability requirements. On the HawkTalk podcast, David Sandars, Regional Director EMEA at datacenterhawk, spoke with Mette Berger Gulbrandsen, Chief Marketing & Communications Officer at Green Mountain, about the company’s journey from Norwegian mountain vaults to a pan-European operator while staying committed to sustainability.

Green Mountain’s unique story began in Rennesøy, Norway, where a former NATO ammunition bunker was transformed into a secure and energy-efficient data center. By using the adjacent fjord’s cold waters for cooling and renewable hydropower, the facility became a model of sustainable design. This ingenuity demonstrated that leveraging natural resources isn’t just environmentally beneficial but also operationally efficient.

Following the success at Rennesøy, Green Mountain expanded to Rjukan, another remote Norwegian location ideal for secure, sustainable operations. However, the company recognized the need for proximity to economic hubs to meet client requirements for low-latency workloads. This shift led to the opening of a facility near Oslo and marked the start of a strategic “hub and spoke” model.

Green Mountain’s growth accelerated after its acquisition by international owners in 2021, boosting resources for expansion. The company struck a major deal with TikTok in 2023 and began international projects, including a London acquisition and a development in Frankfurt. This balanced approach allows Green Mountain to offer clients both cost-effective, sustainable remote storage and urban connectivity.

Green Mountain’s upcoming Frankfurt facility showcases how data centers can tackle power and environmental challenges. Partnering with local energy provider KMW, the site will utilize renewable wind and solar power, while replicating Green Mountain’s water-cooling method using river water.

The facility will also employ gas turbines for backup power, reducing emissions compared to diesel generators, and feed excess heat into the district heating system, warming 20,000 homes. This innovative partnership not only addresses power constraints but also integrates into the local energy ecosystem to add community value.

Green Mountain actively addresses local concerns by showcasing the economic benefits of its projects. Independent studies revealed the construction of its 90 MW site generated $600 million in value and supported 4,700 full-time jobs.

In addition to data-driven evidence, the company engages communities through open days, educational programs, and support for local initiatives. This combination of transparency and outreach has helped Green Mountain build trust and secure long-term community support.

Green Mountain’s journey from a single mountain facility to a leading European data center operator underscores the maturity of the Nordic market. The company has proven that sustainability is not just a value-add but a necessity for scaling operations. Its innovative use of geographic resources, partnerships with energy providers, and commitment to community engagement set a high standard for the industry.

As demand for capacity grows, Green Mountain’s success highlights the importance of creative infrastructure reuse and deep integration with local energy systems, paving the way for a more sustainable future in data center operations.

Repurposing History for Modern Data NeedsExpanding with Strategy: Remote vs. Urban HubsFrankfurt: A Blueprint for Energy CollaborationDemonstrating Economic and Social ImpactA Roadmap for Sustainable Growth