Energy Transition & Environmental Management

What Energy Transition & Environmental Management does

Energy Transition & Environmental Management LLC (ETEM) is a Houston, Texas-based private LLC founded in 2021 that acquires, remediates, and redevelops environmentally challenged industrial sites — primarily former coal-fired power plants and brownfield assets — for energy generation and hyperscale data center use. The company's primary platform is the W.H. Sammis Plant, a 2.3GW former coal facility in Stratton, Ohio acquired from Energy Harbor on September 8, 2023, together with the adjacent 900+ acre Hollow Rock Development site and the Hollow Rock Class III Residual Waste Landfill. ETEM retains and optimizes critical interconnection assets on site, including a 2.5GW FirstEnergy-adjacent substation (345kV at 1,700MW and 138kV at 800MW), owned step-down transformers (345kV to 13.8kV, 13.8kV to 4.1kV, and 4.1kV to 480V), three Norfolk Southern rail spurs, and barge cell access, while having completed decommissioning, chemicals/oils removal, electrical disconnections, and civil work. Final demolition and remediation at Sammis are scheduled for Q4 2026, at which point the site will be flat, graded, and construction-ready.

ETEM's business model is asset-light in operating terms but capital-intensive at acquisition: it buys environmentally distressed properties "As-Is, Where-Is," transfers liabilities, risks, and stranded costs off the seller balance sheet, completes CCR compliance and remediation, then generates revenue through one-time site sales, long-term land leases, sale-leaseback of operating plants, and managed landfill services (currently beneficial re-use of stored gypsum across 14 cells / ~142 permitted acres). The go-to-market is enterprise field sales targeting hyperscale data center operators (power and fiber requirements), energy generation developers (interconnection and permitting advantage), and utilities/IPPs divesting coal assets (liability transfer with bonding, escrow, indemnity, guarantees, and insurance). ETEM has engaged Zayo Group, Comcast, and Lumen Technologies as core fiber partners and has secured Priority Investment Area designation from the Ohio Department of Development, positioning the Sammis/Hollow Rock footprint as a shovel-ready ~330-acre developable campus with substantial adjacent optionality. The company previously executed a brownfield-to-clean-energy flip of the 1,280MW Pleasants Power Plant (acquired December 2022, sold August 2023 to a California-based hydrogen-retrofit buyer), demonstrating a working template for liability transfer monetization.

Name

Energy Transition & Environmental Management

Legal name

Energy Transition & Environmental Management LLC

Website

https://etem.eco

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

Energy Transition & Environmental Management (ETEM) is a Houston-based private LLC that acquires, remediates, and redevelops former coal-fired power plants and brownfield industrial sites — principally the 2.3GW W.H. Sammis Plant and 900+ acre Hollow Rock site in Eastern Ohio — into energy generation and hyperscale data center campuses for enterprise buyers.

Ownership category

akta.pro rank

Product category

Brownfield Industrial Real Estate Redevelopment

NAICS

Remediation and Other Waste Management Services (5629), Remediation Services (562910)

SIC

Wholesale-Durable Goods, Nec (5099)

akta.pro primary industry

Asset Recovery, Surplus & Decommissioning Services (EUAIANAD)

akta.pro secondary industries

Site Preparation & Civil Works (Clearing, Grading, Earthworks, Roads) (EUAMAFAA), Demolition, Decommissioning & Asset Retirement (Environmental Scope) (IMAIAGAH)

Keywords

• Brownfield redevelopment
• Environmental remediation
• Industrial real estate development
• Data center site development
• Energy transition services

Headquarters

HQ city

Austin

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Supply Chain, Marketing or Sales, Technology or R&D

Revenue model

1. Property Acquisition and Disposition: ETEM acquires distressed industrial properties (former coal plants, brownfield sites) with environmental liabilities at reduced costs, remediates them, and either sells redeveloped sites to data center operators and energy companies or enters into long-term lease arrangements.
2. Sale and Leaseback of Operating Plants: ETEM structures flexible arrangements including sale-leaseback of operating plants, removing balance sheet liabilities, risks, and stranded costs from the seller's perspective while generating transaction fees and ongoing lease income.
3. Landfill Operations: ETEM operates the Hollow Rock Class III Residual Waste Landfill, currently conducting beneficial re-use of stored gypsum. The permitted disposal area is approximately 142 acres with 14 cells.
4. Data Center Campus Development: ETEM plans to develop energy and data center campuses at Sammis and Hollow Rock, powered via utility power from existing onsite substations and new onsite firm generation. This creates potential revenue through land leases to data center operators.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

ETEM acquires environmentally challenged industrial properties (former coal plants, brownfield sites, landfills) with environmental liabilities, performs full decommissioning and remediation including CCR compliance closure, retains and optimizes critical interconnection infrastructure (substations, transformers, rail, barge), and redevelops the sites into energy generation and data center campuses for sale or long-term lease to enterprise buyers. The model combines industrial real estate development, environmental remediation, and energy transition infrastructure deployment on a single asset base.

Product overview

ETEM operates as an industrial real estate and environmental remediation company offering a portfolio of brownfield redevelopment services. The core offering consists of acquiring, remediating, and redeveloping former power plant sites into energy generation and data center campuses. The primary products include the W.H. Sammis Plant redevelopment (2.3GW former coal plant) and the Hollow Rock Development (900+ acre expansion site), both in Eastern Ohio, with supporting operations at the Hollow Rock Landfill (Class III waste management). ETEM also previously held and sold the Pleasants Power Plant (1,280MW coal-to-hydrogen conversion). The company retains critical power infrastructure including substations and transformers, and has engaged telecommunications providers for fiber connectivity to support hyperscale data center operations.

Differentiator

Problem solved

Functional benefit

Products and services

• W.H. Sammis Plant Redevelopment Former 2.3GW coal plant being remediated and redeveloped into an energy generation and data center campus with utility power from existing onsite substations and new onsite firm generation, including 170 acres ready for development and ownership of transformers spanning 345kV to 480V.
• Hollow Rock Development 900+ acre property approximately 2.5 miles west of the Sammis Plant offering large-scale expansion of the energy generation and data center redevelopment, with 160 acres ready for development and an additional 300 adjacent developable acres, connected to Sammis by a conveyor system.
• Hollow Rock Landfill Class III Residual Waste Landfill with approximately 142 acres of permitted disposal area divided into 14 cells, currently conducting beneficial re-use operations on stored gypsum.

Quantifiable outcome

• Job creation: ~200 permanent full-time jobs and thousands of construction jobs
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature3 records

Partnerships

Four partnerships are on record, tiered core.

• Energy HarborcoreStrategic or Co-development Partner · 8 September 2023ETEM acquired the W.H. Sammis Plant, Hollow Rock property, and Hollow Rock Landfill from Energy Harbor on September 8, 2023. The W.H. Sammis Power Plant had ceased operations in 2023 prior to acquisition. This acquisition formed the foundation of ETEM's current redevelopment portfolio.
• Zayo GroupcoreTechnology or IntegrationETEM has engaged Zayo Group to develop fiber infrastructure compatible with hyperscale data center requirements at the Sammis and Hollow Rock sites. Zayo's fiber network will provide critical connectivity for data center operations.
• ComcastcoreTechnology or IntegrationETEM has engaged Comcast to develop fiber infrastructure compatible with hyperscale data center requirements at the Sammis and Hollow Rock sites. Comcast's enterprise fiber services will support data center connectivity needs.
• Lumen TechnologiescoreTechnology or IntegrationETEM has engaged Lumen Technologies to develop fiber infrastructure compatible with hyperscale data center requirements at the Sammis and Hollow Rock sites. Lumen's network infrastructure will provide connectivity solutions for data center operations.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• Waste Management Inc. Waste Management is the largest waste services company in North America, with significant landfill operations and a growing environmental services business. It overlaps with ETEM's landfill management and industrial waste services, though at much larger scale and broader scope.
• Republic Services: Republic Services is one of the largest U.S. waste management companies, operating landfills and providing solid and hazardous waste disposal. Its landfill operations and CCR-handling capabilities are directly comparable to ETEM's Hollow Rock Class III Landfill business.

Broad incumbents

• Clean Harbors: Clean Harbors is the largest provider of environmental services in North America, including hazardous waste management, environmental remediation, and industrial cleaning. It is a much larger incumbent that overlaps with ETEM's site remediation and waste management services.
• TRC Companies: TRC Companies is an engineering, environmental consulting, and construction management firm specializing in site assessment, remediation, and energy infrastructure. It serves a similar customer base (utilities, IPPs, developers) on brownfield and power-plant-related projects.
• Stantec: Stantec is a global engineering and environmental services firm with a significant practice in environmental site assessment, remediation design, and energy infrastructure. It provides similar consulting and engineering capabilities for brownfield redevelopment projects.
• Heritage Environmental Services: Heritage Environmental Services is a major U.S. provider of hazardous and industrial waste management, environmental remediation, and on-site industrial services. Its service portfolio overlaps with ETEM's environmental remediation and CCR closure work, though it serves a much broader industrial base.
• Tetra Tech: Tetra Tech is a global consulting and engineering firm with a major practice in environmental remediation, water, and energy infrastructure. It provides design and oversight for site cleanup and brownfield redevelopment work, comparable to ETEM's CCR closure and site remediation activities.

Direct peers

• CenterPoint Properties: CenterPoint Properties is a privately held industrial real estate investment trust that acquires, develops, and operates industrial properties, often in port and logistics markets, with a focus on infill and brownfield redevelopment. Its industrial real estate redevelopment model and customer base (large logistics and industrial tenants) are directly comparable to ETEM's hyperscale data center and energy redevelopment thesis.
• Charah Solutions: Charah Solutions is a leading provider of environmental and maintenance services to the coal-fired and nuclear power generation industry, specializing in Coal Combustion Residuals (CCR) management, ash pond closure, and plant remediation. ETEM's CCR closure work at Sammis and Hollow Rock is directly aligned with Charah's core service offering.
• Industrial Realty Group: Industrial Realty Group is one of the largest privately held industrial real estate developers in the U.S. and specializes in acquiring, remediating, and redeveloping former industrial and brownfield sites, including former power plants, for new commercial and industrial use. It is the most directly comparable peer to ETEM in business model and asset class.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/etemllc

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Energy Transition & Environmental Management