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.

———

This conversation has been edited for brevity and clarity.

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Greentown Labs names first head of philanthropy

new hire

Greentown Labs has named its first-ever head of philanthropy in an "all hands on deck" move to advance philanthropic support for climatetech ventures.

Stacey Harris will join the clean energy incubator and brings more than 15 years of experience to the role, having led major partnerships at organizations like Make-A-Wish International, Movember, Net Impact and the Greater Phoenix Economic Council, according to a release from Greentown.

Harris will be based out of Greentown's Boston-area incubator but will support both its Texas and Massachusetts locations. Greentown maintains headquarters in Houston and Somerville, Massachusetts.

“Stacey brings national reach, local roots, and the entrepreneurial spirit we need,” Georgina Campbell Flatter, CEO of Greentown, said in the release. “She understands that philanthropy isn’t just about raising funds—it’s about building a movement, sustaining an ecosystem, and accelerating change together.”

In her new role, Harris will be tasked with designing and leading a philanthropic strategy that aligns with Greentown's corporate partnerships.

The incubator said in the release that Harris's hire is coming at a "pivotal moment," and the organization is "calling for all hands on deck" to support the clean energy space. "This includes inspiring states and local governments to lean in, individuals and family offices to step up, foundations to mobilize resources, and industry to invest boldly," the release states.

"Philanthropy has the unique power to accelerate innovation where it matters most—by backing the people and ideas that can change the world,” Harris added in the release. “At Greentown, I see an incredible opportunity to partner with local communities in Massachusetts and Texas, while also mobilizing catalytic funds that fuel entrepreneurs globally. I’m energized to work across donors, foundations, and industry to ensure these founders have what they need to go further, faster—together.”

Harris is the latest in a series of new hires for Greentown.

Lawson Gow, founder of The Cannon co-working space and former managing partner at Helium Capital, was named Greentown's Head of Houston in July. Flatter was also named as the organization's new CEO in February, after Naheed Malik was named its new CFO in January.

Houston companies team up on $700M floating solar projects in Texas

float on

Diamond Infrastructure Solutions has given Third Pillar Solar exclusive rights to access Diamond’s Texas reservoirs for the possible launch of utility-scale floating solar installations. Both companies are based in the Houston area.

The potential investment in the floating solar project exceeds $700 million, and the project is expected to generate up to 500 megawatts of solar energy.

“Our agreement with Third Pillar marks a bold step forward in how we think about infrastructure and sustainability. By transforming underutilized water surfaces into clean energy assets, Diamond is advancing its commitment to innovation while delivering long-term value,” Ed Noack, CEO of Diamond Infrastructure Solutions, said in the release.

Dow Chemical Co. and a fund directed by Macquarie Asset Management announced the formation of Diamond in 2024. Dow holds a majority stake in Diamond, which owns Gulf Coast infrastructure used by Dow and other industrial customers at five locations in Texas and Louisiana.

The solar installations are scheduled to be built and in operation by the end of the decade.

The agreement between Diamond and Three Pillar “demonstrates the growing appetite for utility-scale energy solutions and highlights how floating solar can enhance and transform the value of existing infrastructure, all while providing cost-competitive energy, preserving agricultural land, reducing evaporation losses, and existing out of public view,” Jaimeet Gulati, CEO of Third Pillar, added in the realease.

Founded in 2022 and majority-owned by renewable energy investor Glentra Capital, Third Pillar develops, owns and operates floating photovoltaic solar installations. The installations are designed to float in places such as wastewater lagoons, reclaimed sand and gravel pits and industrial reservoirs. Third Pillar’s development pipeline contains more than 60 projects.

Rice Alliance names participants in 22th annual energy forum

where to be

The Rice Alliance for Technology and Entrepreneurship has named the 100 energy technology ventures that will convene next month at the 22nd annual Rice Alliance Energy Tech Venture Forum, as part of the second annual Houston Energy and Climate Startup Week.

Half of the startups, which hail from nine countries and 19 states, will pitch during the event, which culminates in the annual recognition of the “Most Promising Companies." The 12 companies that were named to Class 5 of the Rice Alliance Clean Energy Accelerator will present during Demo Day to wrap up their 10-week program.

In addition to pitches, the event will also host keynotes from Arjun Murti, partner of energy macro and policy at Veriten, and Susan Schofer, partner at HAX and chief science officer at SOSV. Panels will focus on corporate innovation and institutional venture capital. Attendees can also participate in one-on-one office hours with founders and investors.

The forum will take place Sept. 18 at Rice University’s Jones Graduate School of Business.

The 2025 presenting companies include:

  • Aeromine Technologies
  • AlumaPower
  • Ammobia
  • Aqua-Cell Energy
  • Aquafortus
  • Aquora Biosystems
  • Arculus Solutions
  • Artemis Production Solutions
  • AtmoSpark Technologies
  • AtoMe
  • Badwater Alchemy
  • C+UP
  • Carbon Blade
  • Circul8 Energy & Environment
  • CO2 Lock
  • Direct C
  • DirectH2
  • Ekona Power
  • Exum Instruments
  • Fathom Storage
  • Flyscan Systems
  • Geokiln Energy Innovation
  • Glint Solar
  • Hive Autonomy
  • Horne Technologies
  • Hydrogenious LOHC Maritime
  • Innowind Energy Solutions
  • Iron IQ
  • Kewazo
  • LiNova Energy
  • Lukera Energy
  • Lydian
  • Mcatalysis
  • Metal Light
  • Mithril Minerals
  • Moment Energy
  • Moonshot Hydrogen
  • Muon Vision
  • PolyQor
  • Polystyvert dba UpSolv
  • Precision Additive
  • RapiCure Solutions
  • Resollant
  • SiriNor
  • Skyven Technologies
  • Sperra
  • SpiroPak
  • Sweetch Energy
  • Teverra
  • Utility Global
  • Xplorobot

Companies participating in office hours include:

  • Active Surfaces
  • Advanced Reactor Technologies
  • Advanced Thermovoltaic Systems
  • Ai Driller
  • Airbridge
  • Airworks Compressors
  • Austere Environmental
  • Brint Tech
  • CarbonX Solutions
  • Cavern Energy Storage
  • Celadyne Technologies
  • CERT Systems
  • CubeNexus
  • Deep Anchor Solutions
  • Ellexco
  • Emerald Battery Labs
  • Equipt.ai
  • FAST Metals
  • FieldMesh
  • FlowCellutions
  • Fluidsdata
  • GrapheneTX
  • GS VORTEX SYSTEMS
  • Installer
  • Kanin Energy
  • MacroCycle Technologies
  • Modular MOPU
  • NANOBORNE
  • NetForwards
  • Oxylus Energy
  • PetroBricks
  • PHNXX
  • RASMAG Energy
  • RedShift Energy
  • RENASYS
  • RenewCO2
  • Resonantia Diagnostics
  • Respire Energy
  • Safety Radar
  • SeaStock
  • Secant Fuel
  • SolGrapH
  • Stratos Perception
  • Terraflow Energy
  • Think Energy Holdings
  • Turnover Labs
  • Utiltyx
  • Zenthos Energy

Find information about the full day of events here, or click here to register.