Company lists · Data refreshed October 2026

Top 25 Grid interconnection contractors worldwide

Name: Grid interconnection contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 11,792 companies tracked

RevenueBase identified 11,792 company matches for grid interconnection contractors worldwide as of October 2026 and tracks 498,108 professional contacts across them, including 139,011 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for grid interconnection contractors worldwide, 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 October 13, 2026. Country and city lists for grid interconnection contractors follow the table.

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 Oct 13, 2026 How this list was built

11,792Companies

498,108Contacts tracked

139,011Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest grid interconnection contractors worldwide

Ranked by team size

Top 25 of 11,792 company matches for grid interconnection contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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	Worley	Exact match	Sydney, AustraliaHQ recorded Oct 13, 2026	10001+	35,018 contacts →
	Exact match “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Atkinsréalis	Exact match	Montreal, QC, CanadaHQ recorded Oct 13, 2026	10001+	24,297 contacts →
	Exact match “We are a world-class engineering services and nuclear organization.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Oct 13, 2026	10001+	21,087 contacts →
	Exact match “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Amec Foster Wheeler	Exact match	Aberdeen, United KingdomHQ recorded Oct 13, 2026	10001+	15,181 contacts →
	Exact match “Wood Group has combined with Amec Foster Wheeler to form a new global leader in the delivery of project, engineering and technical services to energy and industrial markets.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	KEC International LTD	Exact match	Mumbai, IndiaHQ recorded Oct 13, 2026	5,001-10,000	10,742 contacts →
	Exact match “KEC International Limited, the flagship company of RPG Enterprises is a diversified global infrastructure Engineering, Procurement & Construction (EPC) major, with a presence in…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Snc-Lavalin	Exact match	Montreal, QC, CanadaHQ recorded Oct 13, 2026	10001+	9,694 contacts →
	Exact match “SNC Lavalin is now AtkinsRéalis.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Atkins	Exact match	Epsom, United KingdomHQ recorded Oct 13, 2026	10001+	9,147 contacts →
	Exact match “Atkins is now AtkinsRéalis.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Tata Consulting Engineers	Exact match	Mumbai, IndiaHQ recorded Oct 13, 2026	5,001-10,000	8,533 contacts →
	Exact match “Tata Consulting Engineers Limited (TCE) is the largest Indian private sector engineering and project consultancy and an emerging global leader in integrated engineering solutions.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	KENT	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 13, 2026	10001+	7,369 contacts →
	Exact match “We design, build and maintain the assets that power the world for today and make it future-ready for tomorrow.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Assystem	Exact match	Courbevoie, FranceHQ recorded Oct 13, 2026	5,001-10,000	6,749 contacts →
	Exact match “Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Lamprell	Exact match	Sharjah, United Arab EmiratesHQ recorded Oct 13, 2026	5,001-10,000	6,375 contacts →
	Exact match “With 50 years of experience, Lamprell is a key player in the global offshore wind and oil & gas markets, delivering high-quality, complex energy infrastructure projects.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Mortenson	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 13, 2026	5,001-10,000	5,884 contacts →
	Exact match “Mortenson is a U.S-based, top-25 builder, developer and provider of energy and engineering services committed to helping organizations move their strategies forward.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	GS E&c	Exact match	Seoul, South KoreaHQ recorded Oct 13, 2026	5,001-10,000	5,758 contacts →
	Exact match “GS E&C is Korea`s representative global contractor leveraging its experience in Civil Engineering, Building, Oil & Gas, Power Plants and Renewable Energy to continually provide…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Hubbell Incorporated	Exact match	Shelton, CT, United StatesHQ recorded Oct 13, 2026	10001+	4,366 contacts →
	Exact match “Hubbell Incorporated is a leading manufacturer of utility and electrical solutions that help build more reliable, resilient, and renewable energy infrastructure.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Sargent & Lundy	Exact match	Chicago, United StatesHQ recorded Oct 13, 2026	1,001-5,000	4,341 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Primoris Services Corporation	Exact match	Dallas, TX, United StatesHQ recorded Oct 13, 2026	10001+	4,166 contacts →
	Exact match “Primoris Services Corporation (NYSE: PRIM) is a leading provider of critical infrastructure services to the utility, energy, and renewables markets throughout the United States…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Entrust Solutions Group	Exact match	Lisle, IL, United StatesHQ recorded Oct 13, 2026	1,001-5,000	3,020 contacts →
	Exact match “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	FTI	Exact match	Menasha, WI, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,979 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	Tabocas Participações Empreendimentos S A	Exact match	Belo Horizonte, BrazilHQ recorded Oct 13, 2026	10001+	2,327 contacts →
	Exact match “Fundada em abril de em Belo Horizonte (MG), a Tabocas é referência nacional na modalidade EPC Full, dentro dos setores de construção e engenharia civil, com foco de atuação na…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	LANCO	Exact match	Hyderabad, IndiaHQ recorded Oct 13, 2026	10001+	2,273 contacts →
	Exact match “As one of India's rapidly emerging business entities, LANCO Infratech Limited has been driving growth in the domains of Engineering, Procurement and Construction (EPC), Power…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Omexom	Exact match	Nanterre, FranceHQ recorded Oct 13, 2026	5,001-10,000	2,023 contacts →
	Exact match “With today's global energy sector undergoing constant change, Omexom works with its clients in delivering on the promises of the energy transition.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,980 contacts →
	Exact match “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Rotary Engineering	Exact match	SingaporeHQ recorded Oct 13, 2026	5,001-10,000	1,964 contacts →
	Exact match “Founded 1972 in Singapore, Rotary Engineering is your Strategic Energy Partner providing Integrated Infrastructure Solutions with a sustainability focus.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Shaker Consultancy Group	Exact match	Cairo, EgyptHQ recorded Oct 13, 2026	1,001-5,000	1,911 contacts →
	Exact match “Since its founding in 1982, Shaker has established itself as one of the leading engineering and design firms across the MENA region, with offices in 8 countries and projects…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	Quanta Services, INC	Exact match	Houston, TX, United StatesHQ recorded Oct 13, 2026	10001+	1,901 contacts →
	Exact match “Quanta Services (NYSE: PWR) is the leading specialty contractor with the largest and highly trained skilled workforce in North America, providing fully integrated solutions for…” Recorded in the RevenueBase company graph · Oct 13, 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 “grid interconnection contractors”. 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 25 of 11,792 grid interconnection contractors worldwide

See the full list, filter by size, metro and specialty, and access 139,011 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Grid interconnection contractors worldwide at a glance

As of Oct 13, 2026

27.9%Verified-email coverage

42.2Average contacts per company

11-50Median size (employees)

0.7%Largest-city concentration · Sao Paulo

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

4,699

11-50

4,021

51-200

1,871

201-500

619

501-1,000

228

1,001-5,000

233

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for grid interconnection contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “grid interconnection contractors” 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. 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 139,011 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 October 13, 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.

Grid interconnection contractors by location

56 lists · largest first

Every Grid interconnection contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “grid interconnection contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many grid interconnection contractors are there worldwide?

RevenueBase identified 11,792 company matches for grid interconnection contractors worldwide as of October 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?

Worley tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most grid interconnection contractors?

The United States leads with 1,996 companies, followed by Brazil (1,038) and India (638). Every grid interconnection contractors list by country and city is linked on this page.

Which city has the most grid interconnection contractors?

Sao Paulo leads with 88 company records, followed by London (77) and Belo Horizonte (69).

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 139,011 professional contacts with verified work emails tracked across these 11,792 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 October 13, 2026.

Ready to reach these companies? Verified emails and direct dials for all 11,792 grid interconnection contractors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.