Company lists · Data refreshed September 2026
Top 25 Mining compliance consulting firms based in the United States
RevenueBase identified 1,197 mining compliance consulting firms headquartered in the United States as of September 2026 and tracks 18,283 professional contacts across them, including 7,681 with verified work emails and 7,297 with mobile numbers. Houston is the largest hub.
This list covers mining compliance 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 mining compliance consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Knight PiesoldStrong evidence | 1,231 | |||
“Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,088 | ||||
“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 658 | ||||
“Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 463 | ||||
“Innovation is not happenstance at EnSafe Inc.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 462 | ||||
“GMS Mine Repair & Maintenance is the North American leader in underground and surface mine contracting, maintenance and services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 331 | ||||
“ALL4 is a global consulting firm committed to shaping a sustainable future through innovative environmental, health, and safety (EHS) and digital solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | Ecology And Environment, INCIndirect evidence | 278 | |||
“E&E is now WSP USA.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 218 | ||||
“At Kleinschmidt, we work primarily with energy companies and government agencies in North America to protect and enhance the environment without compromising performance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | Turner Mining GroupPartial evidence | 196 | |||
“Turner Mining Group is a full-service provider to the mining sector with operations throughout the United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | Terraphase Engineering INCIndirect evidence | 166 | |||
“Terraphase offers cost-effective solutions to complex environmental and engineering challenges.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 166 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 152 | ||||
“Founded in 1988, KERAMIDA is a multidisciplinary Sustainability, EHS & Engineering consulting firm grounded in evidence-based research and development.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | Mostardi PlattIndirect evidence | 140 | |||
“Since the passage of original environmental legislation nearly four decades ago, both private and public industry have turned to Mostardi Platt for guidance in complying with air…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 136 | ||||
“OUR MISSION is to combine sustainable environmental solutions with forward-thinking, cost-effective, innovative, and value-added technologies that balance our clients’ economic…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 129 | ||||
“Ensero Solutions is an environmental consulting and remediation business with specific expertise in environmental assessments and permitting solutions, mine water management…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 126 | ||||
“CMS Environmental Solutions is a stormwater compliance consultant providing NOI permitting, development, dewatering planning, site inspections, and custom stormwater management…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 122 | ||||
“Welcome to SDS Petroleum Consultants company page In Scott Stovall founded SDS Petroleum Consultants L.L.C.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 116 | ||||
“Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | Skelly And Loy, Inc., A Terracon CompanyIndirect evidence | 108 | |||
“Established in 1969, Skelly and Loy is a privately owned, mid-sized corporation with 6 Mid-Atlantic offices.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 104 | ||||
“Established in 1983, TechLaw provides environmental and management consulting services to the public sector nationwide.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 103 | ||||
“Hart & Hickman PC provides environmental consulting services to commercial, industrial, and governmental clients throughout the Southeast US.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 102 | ||||
“Founded in 1993, Citadel EHS provides comprehensive environmental, health, safety, and sustainability consulting solutions to meet the needs of both the public and private sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 101 | ||||
“CK Associates is an environmental consulting firm that is fully owned by its employees.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 98 | ||||
“Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 92 | ||||
“Yorke Engineering, LLC (Yorke) was founded in 1996 and specializes in air quality, waste, storm water and industrial hygiene/safety services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 1,197 mining compliance consulting firms based in the United States
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Mining compliance consulting firms based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 mining compliance consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “mining compliance consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among mining compliance 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 an evidence 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, 7,681 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 5, 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.
Mining compliance consulting firms by metro
- Mining compliance consulting firms in Houston54
Frequently asked
How many mining compliance consulting firms are there based in the United States?
RevenueBase identified 1,197 mining compliance 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?
Knight Piesold, headquartered in Denver, tops this list with the largest team on record.
Which city has the most mining compliance consulting firms?
Houston leads with 54 headquartered companies, followed by Denver (20) and New York (17).
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 7,681 verified decision-maker contacts tracked across these 1,197 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 5, 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 SmartSearch, 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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