Company lists · Data refreshed September 2026

Top 20 Geoscience consulting firms based in Washington, United States

Name: Geoscience consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 39 companies tracked

RevenueBase identified 39 company matches for geoscience consulting firms associated with Washington, United States as of September 2026 and tracks 588 professional contacts across them, including 181 with verified work emails. Across the United States, Houston is the largest hub for this category (371 companies); Washington has 39.

This list covers company matches for geoscience consulting firms associated with Washington, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

39Companies

588Contacts tracked

181Verified emails

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The 20 largest geoscience consulting firms based in Washington, United States

Ranked by team size

Top 20 of 39 company matches for geoscience consulting firms based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	IKM Information And Knowledge Management	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	99 contacts →
	Exact match “IKM is a leading service provider with more than 20 years of expertise in the Oil & Gas and Mining industries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Delon Hampton & Associates, Chartered	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	72 contacts →
	Exact match “Delon Hampton & Associates, Chartered (DHA), is a professional consulting engineering firm specializing in civil and structural engineering, as well as program and construction…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Peer Consultants, P.C	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	71 contacts →
	Exact match “In 1978, PEER was established under Dr.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Moody And Associates, INC	Exact match	Washington, PA, United StatesHQ recorded Sep 28, 2026	51-200	54 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Soil And Land USE Technology	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	30 contacts →
	Exact match “SaLUT is a client-focused company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Northbridge	Exact match	Washington, United StatesHQ recorded Sep 28, 2026	11-50	24 contacts →
	Exact match “At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Interagency INC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	19 contacts →
	Exact match “InterAgency provides preconstruction consulting for the Washington Metro Area’s most complex and challenging infrastructure projects.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Harshman CE Group, LLC	Exact match	Washington, PA, United StatesHQ recorded Sep 28, 2026	11-50	19 contacts →
	Exact match “We are a full service Professional Engineering consulting firm providing civil site and infrastructure design, professional land surveying, facility design, and permitting support…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Numark Associates, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	15 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Blackwoods Group	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	14 contacts →
	Exact match “Blackwoods Group is an agriculture and natural resource consulting firm that provides a variety of services ranging from government relations to development and implementation of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	TSG Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	11 contacts →
	Exact match “For over 30 years, TSG has provided companies around the world with regulatory guidance and scientific expertise.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	DRM International, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	7 contacts →
	Exact match “DRM International, Inc,(DRM) is a leading DIsadvantaged Business Enterprise (DBE) professional engineering consulting firm offering engineering, architectural, planning…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Deborah Brosnan & Associates	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Strategic Conservation Solutions, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “Strategic Conservation Solutions, LLC (SCS) is a specialized consulting firm providing advocacy, visioning and strategic positioning to firms and associations in the areas of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Warwick Group Consultants, LLC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “Warwick Group Consultants is the Nation's premier consulting firm for local governments with coastal projects involving beach nourishment, dredging, aquatic ecosystem restoration…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	LKI Consulting INC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “At LKI Consulting we understand that your site team is busy with the large amount of tasks required of them.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Empower Infrastructure	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “EMPOWER INFRASTRUCTURE LLC is registered as CBE, SBE, and DBE for Washington DC, DDOT, Virginia, VDOT, and WMATA.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	SVB Energy International	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	11-50	1 contacts →
	Exact match “SVB Energy International LLC is a global strategic energy consulting firm specialized in the oil and gas industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Andmore Associates, LLC	Exact match	Washington, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “AndMore Associates LLC is a global business development and consulting firm focused on advancing markets and building partnerships in agriculture, energy, and environment.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Global, Inc. USA	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “Global, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “geoscience consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 20 of 39 geoscience consulting firms based in Washington, United States

See the full list, filter by size, metro and specialty, and access 181 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geoscience consulting firms based in Washington, United States at a glance

As of Sep 28, 2026

30.8%Verified-email coverage

15.1Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 39 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Washington, United States whose business descriptions match “geoscience consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 181 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Geoscience consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geoscience consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geoscience consulting firms are there based in Washington, United States?

RevenueBase identified 39 company matches for geoscience consulting firms associated with Washington, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

IKM Information And Knowledge Management tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most geoscience consulting firms?

Houston leads the United States with 371 company records, followed by Denver (109) and Austin (78). Washington has 39.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 181 professional contacts with verified work emails tracked across these 39 companies; direct dials are available where recorded.

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 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.