Company lists · Data refreshed September 2026
Top 25 Landfill gas energy consulting firms based in the United States
RevenueBase identified 209 landfill gas energy consulting firms headquartered in the United States as of September 2026 and tracks 2,304 professional contacts across them, including 913 with verified work emails. Houston is the largest hub.
This list covers landfill gas energy consulting firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest landfill gas energy consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 96 contacts → | ||||
Partial evidence “Nacelle is a gas conditioning and processing company serving two distinct markets: biogas and oil and gas.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 96 contacts → | ||||
Strong evidence “Integrity Environmental Solutions is an engineering and consulting firm offering integrated landfill gas (LFG) and solid waste services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 91 contacts → | ||||
Partial evidence “Biogas Engineering is an award winning, one of the fastest growing companies in field of Renewable Natural Gas.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 83 contacts → | ||||
Strong evidence “We are one of the largest contractors in the nation to provide gas extraction, leachate collection, and operations and maintenance services for the landfill industry.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 82 contacts → | ||||
Strong evidence “CONTACT US: geosyntheticsAEG@tetratech.com AEG’s extensive experience has made it the leader in landfill gas (LFG) system construction and the premier supplier and installer of…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 79 contacts → | ||||
Strong evidence “Montauk is a fully integrated renewable energy company specializing in the management, recovery and conversion of landfill methane into renewable energy.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 61 contacts → | ||||
Partial evidence “Cornerstone, A Tetra Tech Company, is an engineering consulting and field service firm dedicated to providing services to the solid waste industry and commercial, industrial, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 50 contacts → | ||||
Strong evidence “BEL Environmental Engineering, LLC (BEL) is a solid waste consulting firm that specializes in landfill construction quality assurance (CQA) and landfill gas (LFG) systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 50 contacts → | ||||
Partial evidence “Venture Engineering & Construction provides high-value consultancy, engineering, project and construction management services to the world’s energy, power, and process industries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 48 contacts → | ||||
Partial evidence “Vision RNG brought together a team of seasoned professionals with decades of experience across the natural gas and waste management industries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 46 contacts → | ||||
Partial evidence “Smith+Gardner is an employee-owned, industry-leading solid waste consulting engineering firm committed to delivering sound, innovative solid waste solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 46 contacts → | ||||
Strong evidence “Solid waste contractor specializing in all phases of landfill gas services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 46 contacts → | ||||
Strong evidence “Morrow Renewables, LLC, has been busy reducing global methane emissions, and revolutionizing landfill gas (LFG) collection and refinement technologies utilizing its own patented…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 42 contacts → | ||||
Partial evidence “TCO Land & Regulatory has been advancing the energy sector as a trusted partner for nearly 70 years, offering exceptional land services, project management, and energy compliance.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 39 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 35 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 31 contacts → | ||||
Partial evidence “Aria Energy is a market leader and one of the largest companies in the North American LFG sector.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 28 contacts → | ||||
Strong evidence “Renewable energy consulting firm offering customized solutions for industrial and agricultural portfolios across the country.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 27 contacts → | ||||
Strong evidence “Most prominently serving the landfill, oil and natural gas, coal, and quarry industries, Preston Contractors has become a leader in all things energy-related.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 25 contacts → | ||||
Strong evidence “The Landfill Group's unique team approach for Development, Construction, Manufacturing, O&M and Ownership of landfill gas projects across the country, allows us to provide a…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 25 contacts → | ||||
Strong evidence “JMI Consultants, LLC ("JMI") is a full-service energy management and consulting firm, focused on bringing simplicity to the procurement process.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 22 contacts → | ||||
Indirect evidence “NuCycle is a rapidly expanding materials management company, with patented and proprietary materials optimization and alternative fuels technology.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Partial evidence “For 19 years, Acclaim Energy has been successfully advising Hospitals, Businesses, Government entities, and Schools to address their most critical energy issues such as…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 21 contacts → | ||||
Partial evidence “We are an environmental consulting firm that specializes in providing cities and counties throughout California and the west coast with trash, recycling, and organics recycling…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 20 contacts → | ||||
Partial evidence “Tent Engineering is a team of highly experienced, highly specialized engineers and project managers specifically focused on the bio-gas utilization industry.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: landfill gas energy consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names landfill gas energy consulting firms.
- Partial evidence
- Its own public description names part of landfill gas energy consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name landfill gas energy consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 209 landfill gas energy consulting firms based in the United States
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Landfill gas energy consulting firms based in the United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 209 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among landfill gas energy consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “landfill gas energy consulting firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names landfill gas energy consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among landfill gas energy consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 913 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names landfill gas energy consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many landfill gas energy consulting firms are there based in the United States?
RevenueBase identified 209 landfill gas energy consulting firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Nacelle Solutions, headquartered in Charleston, tops this list with the largest team on record.
Which city has the most landfill gas energy consulting firms?
Houston leads with 13 headquartered companies, followed by Charlotte (6) and Denver (5).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 913 verified decision-maker contacts tracked across these 209 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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