Q&A

Why Nabors wants to be an early leader within the energy transition

In a Q&A with EnergyCapital, Guillermo Sierra of Nabors Industries explains how the 70-year-old company is navigating the energy transition. Photo via LinkedIn

With over 70 years of experience, Nabors Industries has established itself as one of the largest land contract drilling companies in the world, as well as a provider of offshore platform rigs in the United States and international markets. But how is the company thinking of its next decades amid the energy transition?

Considering the role Nabors is playing in the future of energy is Houston-based Guillermo Sierra's job as vice president of energy transition. In a Q&A with EnergyCapital, he explains how the company envisions its future as an energy leader and what all that entails, including sourcing new technologies — sometimes from promising startups like Sage Geosystems.

EnergyCapital: Tell me about Nabors' commitment to the energy transition. What are your responsibilities leading this initiative?

Guillermo Sierra: Understanding that no single source today consistently delivers affordable, reliable and responsible energy, Nabors sees its future innovating solutions for hydrocarbons and clean energy while removing the tradeoffs between them. “Energy Without Compromise” is the vision guiding these efforts. Ultimately, we view three critical paths for the industry and ourselves to realize this:

  • Embrace energy innovation over energy exclusion. Too often the energy transition conversation is about excluding particular sources when we should be focused on solving challenges or overcoming limitations with technology. Oil and gas provide affordable and reliable energy but we must address emissions. Renewables are a greener solution but powering society, heavy industries, and hard-to-abate sectors requires sources that are clean, scalable, and baseload-seeking. For our part, we are lowering the carbon intensity of oil and gas operations with AI-based engine management software, fuel enhancers, highline power solutions, energy storage and forthcoming hydrogen injection systems while also investing in geothermal, concentrated solar power, alternative energy storage, emissions monitoring, hydrogen, and advanced materials, to make renewables a viable solution to decarbonize the industrial and energy industries.
  • Capitalize on strengths and adjacencies. Companies should seek opportunities to apply skillsets and competencies to advance other industries in the pursuit of a sustainable future. It is easy to see how our drilling expertise is valuable to the geothermal industry. Those companies need to drill wells and use technology that’s been developed by the oil and gas industry for decades to produce heat instead of hydrocarbons. Beyond the drill bit though, companies in the broader clean energy community see tremendous strategic value in partnering with Nabors. Our robotics, remote operations, software, automation, AI, manufacturing and engineering capabilities, global customer base of some of the world’s largest companies, worldwide vendor relationships and supply chain can be used to help startups grow and scale much more quickly.
  • Collaborate to accelerate progress. The proverb is if you want to go fast, go alone. If you want to go deep or go far, go together. Working together and leveraging collective strengths will help us solve some of the most meaningful challenges. There’s room for us all and we need to work together to achieve emissions goals.

EC: When considering a clean tech company, what are the top qualities driving your investment decisions? How did Sage Geosystems fit what you were looking for?

GS: Traditionally, renewables have stumbled some in the power business because they are intermittent and therefore not dispatchable or reliable baseload. There are also safety, supply chain, and environmental challenges to overcome with lithium-ion batteries and the lack of circularity of panels, blades, and other equipment. Additionally, to decarbonize industrial processes, you need clean and efficient sources of heat – which have largely been nonexistent. And the broader industrials complex needs green fuels, hydrogen and sustainable aviation fuel to eliminate their carbon footprint.

Therefore we believe the world needs clean, renewable, scalable, and baseload/dispatchable generation, and alternatives to today’s chemical-based energy storage. When we evaluate our investments, this is what we’re ultimately seeking.

Sage checks every one of these boxes. The company envisions producing renewable baseload power from geothermal and has novel solutions to energy storage. And unlike many geothermal companies, their approach is deployable today with off the shelf technologies.

EC: What role do you see enhanced geothermal playing in the energy transition?

GS: In my opinion, geothermal has been the gaping hole so to speak in net zero plans from companies and governments. Less than 1 percent of the earth is cooler than 1,000 degrees Celsius. Heat gradients needed are miles away while the sun is 93 million miles away. The oil and gas industry has spent decades perfecting how we drill safely and efficiently. We have near limitless energy beneath our feet and have the tools to tap it. Now we need the focus and capital of the broader energy complex.

EC: How big are your long-term aspirations for Nabors in regards to the energy transition?

GS: I believe the energy transition will represent one of the biggest reallocations of capital in human history. By some estimates, some $300 trillion is expected to spent. We want to be a leader. We want in early. We believe we have the skills, competencies, workforce, relationships, and scale to make a meaningful impact and we are taking action.

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This conversation has been edited for brevity and clarity.

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A View From HETI

Vaulted Deep is planning a North American buildout. Photo via vaulteddeep.com

Houston-based Vaulted Deep, a waste management and carbon removal company, has announced a major $35 million debt facility from Italian investment bank Mediobanca to support its national expansion.

U.K.-based market energy solutions CFP Energy arranged the deal, which is “the largest publicly disclosed U.S. commercial debt deal in durable carbon removal to be secured by long-term purchase contracts,” according to a news release from the companies.

The financing will support new waste disposal sites for Vaulted Deep and advancements of the company’s AI-enabled site development platform. The platform helps identify locations, navigate permitting and optimize injection operations. When candidates are looking for sites, the platform will pull from regulatory, geology and waste-supply data to assist, which Vaulted Deep says will help streamline the permitting process. After the site is operating, the platform helps control algorithms to maximize safe disposal capacity and monitor the process along the way.

"Waste operators across the country need new options as traditional disposal options become limited,” Julia Reichelstein, CEO and co-founder of Vaulted Deep, said in the release. “This financing lets us take on more projects and invest in the tools that help us evaluate and develop new sites faster. This is a meaningful milestone for Vaulted as we move into the next phase of building infrastructure at a much larger scale."

The deal is supported by Vaulted Deep's long-term waste service and carbon removal purchase contracts. The company says it delivered more than 20,000 tons of carbon removal to buyers in the first half of 2026, which is more than it delivered in all of 2025.

"By facilitating these types of transactions, we connect institutional capital with innovative climate technologies, helping accelerate the deployment of high-integrity carbon removal solutions,” Tyler Manchester, head of voluntary carbon for CFP Energy, added in the release. “It reflects growing investor confidence in these solutions, driven by rising demand from corporate buyers seeking permanent pathways to support net-zero commitments and long-term climate strategies."

Beyond the facility, Vaulted Deep has secured $48 million in equity financing in addition to its $8 million from the XPRIZE Carbon Removal competition, backed by Elon Musk’s charitable organization, The Musk Foundation.

The company's well injection technology is used to store organic waste deep underground in stable geologic formations. In 2025, it inked a 12-year deal with Microsoft to remove up to 4.9 million metric tons of carbon dioxide from the environment.

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