Company lists · Data refreshed October 2026

Top 25 Operations and maintenance contractors worldwide

Name: Operations and maintenance contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 22, 2026 15,473 companies tracked

RevenueBase identified 15,473 company matches for operations and maintenance contractors worldwide as of October 2026 and tracks 447,207 professional contacts across them, including 74,897 with verified work emails. The United States is the largest market and Dubai the largest hub.

This list covers company matches for operations and maintenance 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 22, 2026. Country and city lists for operations and maintenance 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 22, 2026 How this list was built

15,473Companies

447,207Contacts tracked

74,897Verified emails

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The 25 largest operations and maintenance contractors worldwide

Ranked by team size

Top 25 of 15,473 company matches for operations and maintenance contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 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	ABM Industries	Exact match	NY, United StatesHQ recorded Oct 22, 2026	10001+	23,041 contacts →
	Exact match “ABM is one of the world’s largest providers of integrated facility, engineering, and infrastructure solutions.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
2	Manserv	Exact match	São Caetano Do Sul, BrazilHQ recorded Oct 22, 2026	10001+	16,313 contacts →
	Exact match “A Manserv tem no ato de servir sua principal vocação.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
3	MITIE	Exact match	London, United KingdomHQ recorded Oct 22, 2026	10001+	14,608 contacts →
	Exact match “Founded in 1987, Mitie is the UK’s leading facilities management and professional services company.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
4	Emrill Services LLC	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 22, 2026	10001+	5,727 contacts →
	Exact match “Emrill Services LLC is a multi-award-winning integrated facilities management provider in the UAE, providing a full range of hard and soft FM and manned security services with…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
5	Equans	Exact match	Courbevoie, FranceHQ recorded Oct 22, 2026	10001+	5,490 contacts →
	Exact match “Equans, a Bouygues group company, is a world leader in multi-technical services with offices in 20 country hubs.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
6	Equans Belux	Exact match	Brussels, BelgiumHQ recorded Oct 22, 2026	5,001-10,000	5,347 contacts →
	Exact match “What if you could use your talent to contribute to the great challenges of tomorrow?” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
7	BVG India Limited	Exact match	Pune, IndiaHQ recorded Oct 22, 2026	10001+	4,510 contacts →
	Exact match “Founded in 2002, BVG India Limited is India’s largest and leading Integrated Facility Management (IFM) company, offering comprehensive solutions that combine skilled people…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
8	STORK	Exact match	Utrecht, NetherlandsHQ recorded Oct 22, 2026	10001+	3,942 contacts →
	Exact match “Stork is a global provider of integrated operations, maintenance, modification and asset integrity solutions.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
9	Atalian	Exact match	Vitry-sur-seine, FranceHQ recorded Oct 22, 2026	10001+	3,810 contacts →
	Exact match “ATALIAN is a major operator in Cleaning and Facility Management in France and Europe.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
10	Imdaad Group	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 22, 2026	10001+	3,330 contacts →
	Exact match “Imdaad, a Dubai-based group of companies, is a regional leader in Integrated Facilities Management (IFM), renowned for its commitment to operational excellence, innovation, and…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11	Seder Group	Exact match	Al Malqa, Saudi ArabiaHQ recorded Oct 22, 2026	10001+	2,770 contacts →
	Exact match “مجموعة سدر للتجارة والمقاولات هي شركة مختصة ورائدة في تقديم حلول إدارة المرافق المتكاملة وخدمات التشغيل والصيانة بمختلف المجالات وبخبرة تمتد إلى أكثر من ٤٦ عامًا مساهمةً في خلق…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
12	Servest SA	Exact match	Johannesburg, South AfricaHQ recorded Oct 22, 2026	10001+	2,734 contacts →
	Exact match “Enhancing Facilities Ecosystems At Servest, we see facilities as living ecosystems – dynamic environments that support people, drive business efficiency and create value over time.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
13	Khidmah	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 22, 2026	1,001-5,000	2,416 contacts →
	Exact match “Our facility management solutions are designed to offer the perfect mix of services for your facility and budget.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
14	Advanced Technology Services ATS	Exact match	Peoria, IL, United StatesHQ recorded Oct 22, 2026	1,001-5,000	2,282 contacts →
	Exact match “Advanced Technology Services, Inc.(ATS) is a single source for industrial maintenance, technology and parts, offering a complete solution for support, training, monitoring and…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15	Fm2c	Exact match	Campinas, BrazilHQ recorded Oct 22, 2026	5,001-10,000	2,188 contacts →
	Exact match “A FM2C destaca-se no cenário empresarial brasileiro como uma força inovadora no setor de Serviços Industriais, Facilities e Volantes.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
16	Bilfinger UK	Exact match	Warrington, United KingdomHQ recorded Oct 22, 2026	1,001-5,000	2,157 contacts →
	Exact match “With a strong commitment to sustainability, Bilfinger UK stands out as a premier provider of engineering and maintenance services.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17	ELFE	Exact match	Macaé, BrazilHQ recorded Oct 22, 2026	1,001-5,000	2,006 contacts →
	Exact match “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18	NAES	Exact match	Issaquah, WA, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,999 contacts →
	Exact match “NAES is the power generation industry’s largest independent services provider, with more than 40 years of experience managing risk and turning it into profits.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
19	Brown & Root Industrial Services, LLC	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 22, 2026	5,001-10,000	1,969 contacts →
	Exact match “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20	Zahran Facilities Management	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 22, 2026	10001+	1,947 contacts →
	Exact match “Zahran FM is the largest and most accomplished FM company in the Kingdom of Saudi Arabia, founded on a reputation for service excellence that spans more than 40 years, and…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
21	Dietsmann	Exact match	Fontvieille, MonacoHQ recorded Oct 22, 2026	5,001-10,000	1,931 contacts →
	Exact match “Dietsmann is the leading independent specialist in Operation & Maintenance services for continuous-production plant in the oil & gas and power industries with over 40 years of…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22	Tdindustries, INC	Exact match	Dallas, TX, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,925 contacts →
	Exact match “TDIndustries delivers a comprehensive approach to Facility Services and Mechanical Construction.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23	Coopservice	Exact match	Reggio Emilia, ItalyHQ recorded Oct 22, 2026	10001+	1,911 contacts →
	Exact match “Il nostro Purpose: “Abbiamo a cuore e valorizziamo i vostri mondi” Ogni attività umana ha bisogno di luoghi per compiersi: abitazioni, uffici, industrie, centri commerciali…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24	Grupo RCS	Exact match	Brasilia, BrazilHQ recorded Oct 22, 2026	5,001-10,000	1,870 contacts →
	Exact match “A RCS é uma empresa de Engenharia especializada em oferecer serviços técnicos de missão crítica com alta tecnologia aplicada, para clientes que necessitam manter suas atividades…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25	Spie Facilities	Exact match	Saint-ouen-sur-seine, FranceHQ recorded Oct 22, 2026	1,001-5,000	1,788 contacts →
	Exact match “Nouvelle filiale du groupe SPIE, leader européen des services multi-technique dans les domaines de l’énergie et des communications, depuis janvier 2017 SPIE Facilities est un…” Recorded in the RevenueBase company graph · Oct 22, 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 “operations and maintenance 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 15,473 operations and maintenance contractors worldwide

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Operations and maintenance contractors worldwide at a glance

As of Oct 22, 2026

16.7%Verified-email coverage

28.9Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · Dubai

Oct 22, 2026Page data refreshed

Companies by employee count

1-10

5,223

11-50

5,258

51-200

2,697

201-500

978

501-1,000

472

1,001-5,000

507

5,001-10,000

112

10001+

116

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 operations and maintenance contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “operations and maintenance 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 74,897 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 22, 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.

Operations and maintenance contractors by location

61 lists · largest first

Every Operations and maintenance 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 “operations and maintenance contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many operations and maintenance contractors are there worldwide?

RevenueBase identified 15,473 company matches for operations and maintenance 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?

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

Which country has the most operations and maintenance contractors?

The United States leads with 2,567 companies, followed by the United Kingdom (1,300) and Brazil (1,230). Every operations and maintenance contractors list by country and city is linked on this page.

Which city has the most operations and maintenance contractors?

Dubai leads with 316 company records, followed by Sao Paulo (217) and London (211).

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 74,897 professional contacts with verified work emails tracked across these 15,473 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 22, 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.