Company lists · Data refreshed September 2026

Top 25 Oil and gas outsourced accounting firms worldwide

Name: Oil and gas outsourced accounting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 8,488 companies tracked

RevenueBase identified 8,488 oil and gas outsourced accounting firms worldwide as of September 2026 and tracks 99,425 professional contacts across them, including 12,324 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers oil and gas outsourced accounting firms worldwide, 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 21, 2026. Country and city lists for oil and gas outsourced accounting firms follow the table.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

8,488Companies

99,425Contacts tracked

12,324Verified emails

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The 25 largest oil and gas outsourced accounting firms worldwide

Ranked by team size

Top 25 of 8,488 oil and gas outsourced accounting firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas outsourced accounting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	PT Elnusa TBK	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	3,932 contacts →
	Strong evidence “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Source: RevenueBase Database · checked Sep 21, 2026
2	Oilserv	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	1,001-5,000	2,249 contacts →
	Indirect evidence “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Source: RevenueBase Database · checked Sep 21, 2026
3	Personiv	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	10001+	2,231 contacts →
	Partial evidence “OUR PEOPLE, YOUR PRIORITIES Streamline your finance & accounting team at 50% cost savings with a team as small as one.” Source: RevenueBase Database · checked Sep 21, 2026
4	Sinopec International Petroleum Service Corporation	Indirect evidence	北京市, ChinaHQ checked Sep 21, 2026	10001+	1,952 contacts →
	Indirect evidence “Sinopec International Petroleum Service Corporation SSC” Source: RevenueBase Database · checked Sep 21, 2026
5	TGS	Strong evidence	Comuna 1, ArgentinaHQ checked Sep 21, 2026	1,001-5,000	1,159 contacts →
	Strong evidence “Somos la compañía de energía lider en la prestación de servicios integrados en la industria Oil & Gas Nuestros servicios y soluciones permiten integran toda la cadena de valor del…” Source: RevenueBase Database · checked Sep 21, 2026
6	Carso Perforación	Indirect evidence	United StatesHQ checked Sep 21, 2026	1,001-5,000	994 contacts →
	Indirect evidence “Empresa líder en el Sector Petrolero, con presencia a Nivel Nacional, principales clientes PEMEX Y CFE, con servicios como perforación de pozos terrestres, Marinos, Geotérmicos…” Source: RevenueBase Database · checked Sep 21, 2026
7	Bernhoeft	Indirect evidence	Recife, BrazilHQ checked Sep 21, 2026	501-1,000	833 contacts →
	Indirect evidence “A Bernhoeft Contadores é uma empresa de atuação nacional que oferece terceirização de serviços contábeis para clientes de diversos portes e segmentos.” Source: RevenueBase Database · checked Sep 21, 2026
8	Blockchain-Startups-Commnunity	Indirect evidence	Vung Tau, VietnamHQ checked Sep 21, 2026	5,001-10,000	793 contacts →
	Indirect evidence “Exploration and development oilfield” Source: RevenueBase Database · checked Sep 21, 2026
9	Pioneer Energy Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	770 contacts →
	Indirect evidence “Pioneer Energy Services is now Patterson-UTI” Source: RevenueBase Database · checked Sep 21, 2026
10	Burgan Company For Well Drilling, Trading & Maintenance Kscc	Indirect evidence	United StatesHQ checked Sep 21, 2026	201-500	745 contacts →
	Indirect evidence “Burgan Company for Well Drilling, Trading & Maintenance K.S.C was founded in 1970.” Source: RevenueBase Database · checked Sep 21, 2026
11	Deep Industries Limited	Strong evidence	Ahmedabad, IndiaHQ checked Sep 21, 2026	501-1,000	714 contacts →
	Strong evidence “Deep Industries Limited started in the year 1991, with a primary objective of catering the ever increasing demand for Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 21, 2026
12	EMEC	Strong evidence	Cairo, EgyptHQ checked Sep 21, 2026	501-1,000	669 contacts →
	Strong evidence “EMEC is a regional oil and gas services company built on more than four decades of operational experience, regional insight, and deep technical expertise.” Source: RevenueBase Database · checked Sep 21, 2026
13	Island Operating Company	Strong evidence	Scott, LA, United StatesHQ checked Sep 21, 2026	1,001-5,000	570 contacts →
	Strong evidence “Improving efficiency and reducing costs, all while meeting safety requirements, is the challenge faced by every operator in the oil and gas industry.” Source: RevenueBase Database · checked Sep 21, 2026
14	Outbooks	Strong evidence	Harrow, United KingdomHQ checked Sep 21, 2026	201-500	477 contacts →
	Strong evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 21, 2026
15	Share Microfin LTD	Partial evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	1,001-5,000	477 contacts →
	Partial evidence “Share Microfin Ltd is an Accounting company located in 1-224/58, Rajeev Nagar, Nacharam, Hyderabad, Andhra Pradesh, India.” Source: RevenueBase Database · checked Sep 21, 2026
16	Enervest, LTD	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	424 contacts →
	Strong evidence “EnerVest is a top-tier, low-cost oil and natural gas operating company.” Source: RevenueBase Database · checked Sep 21, 2026
17	North Drilling Company	Strong evidence	Tehran, IranHQ checked Sep 21, 2026	1,001-5,000	404 contacts →
	Strong evidence “North Drilling, a leading company in oil and gas well drilling, has worked out important strategies in line with its vision plan.” Source: RevenueBase Database · checked Sep 21, 2026
18	EGPC	Indirect evidence	New Maadi, EgyptHQ checked Sep 21, 2026	1,001-5,000	391 contacts →
	Indirect evidence “Egyptian General Petroleum Corporation- EGPC (الهيئة المصرية العامة للبترول) is a holding company which was established in 1956.” Source: RevenueBase Database · checked Sep 21, 2026
19	Unison Globus	Strong evidence	Coral Springs, FL, United StatesHQ checked Sep 21, 2026	201-500	320 contacts →
	Strong evidence “Unison Globus is a global accounting outsourcing and offshore staffing partner dedicated to supporting CPA firms and accounting professionals.” Source: RevenueBase Database · checked Sep 21, 2026
20	GET Global Group	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	501-1,000	307 contacts →
	Indirect evidence “GET Global Group provides turnkey solutions that lower Operating Expenses, provide operational flexibility, share risks, optimize resources, and develop local capacity in the…” Source: RevenueBase Database · checked Sep 21, 2026
21	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 21, 2026	201-500	272 contacts →
	Indirect evidence “Founded as C&D Wireline in 1968, with C&D Production Specialist joining the business in 1993, today Crosby Energy Services is a certified Women’s Business Enterprise National…” Source: RevenueBase Database · checked Sep 21, 2026
22	PT Permata Karya Jasa	Indirect evidence	Jakarta Pusat, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	270 contacts →
	Indirect evidence “PT Permata Karya Jasa (Perkasa) merupakan anak perusahaan PT Permata Graha Nusantara (PGN Mas) yang didirikan pada tanggal 29 April 2015, pendirian PT Permata Karya Jasa…” Source: RevenueBase Database · checked Sep 21, 2026
23	Oremus Corporate Services	Partial evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	201-500	260 contacts →
	Partial evidence “At Oremus Corporate Services, we specialize in delivering top-notch Accounting and Bookkeeping, Secretarial Compliance, Payroll, Tax, HR, and Business Advisory Services.” Source: RevenueBase Database · checked Sep 21, 2026
24	M&h	Strong evidence	Spring, TX, United StatesHQ checked Sep 21, 2026	201-500	253 contacts →
	Strong evidence “For more than 40 years, M&H has been a trusted source for oil & gas consulting services that maximize value for clients.” Source: RevenueBase Database · checked Sep 21, 2026
25	Virtual Clone	Strong evidence	Bhilai, IndiaHQ checked Sep 21, 2026	51-200	243 contacts →
	Strong evidence “Virtual Clone is a leading provider of accounting outsourcing services, tailored specifically for ACCA/FCCA and Chartered Accountancy firms in the UK and Australia.” Source: RevenueBase Database · checked Sep 21, 2026

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: oil and gas outsourced accounting 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 oil and gas outsourced accounting firms.
Partial evidence: Its own public description names part of oil and gas outsourced accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas outsourced accounting 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 8,488 oil and gas outsourced accounting firms worldwide

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Oil and gas outsourced accounting firms worldwide at a glance

As of Sep 21, 2026

12.4%Verified-email coverage

11.7Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

5,598

11-50

2,045

51-200

538

201-500

149

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 oil and gas outsourced accounting 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.
Coverage: Every country. Country and city lists for oil and gas outsourced accounting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas outsourced accounting 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 oil and gas outsourced accounting 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 oil and gas outsourced accounting firms, and records with no verified work email.
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, 12,324 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 21, 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.

Oil and gas outsourced accounting firms by location

35 lists · largest first

Every Oil and gas outsourced accounting firms 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 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 oil and gas outsourced accounting 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 oil and gas outsourced accounting firms are there worldwide?

RevenueBase identified 8,488 oil and gas outsourced accounting firms worldwide 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?

PT Elnusa TBK, headquartered in Jakarta Selatan Dki Jakarta, tops this list with the largest team on record.

Which country has the most oil and gas outsourced accounting firms?

The United States leads with 2,384 companies, followed by Brazil (753) and the United Kingdom (568). Every oil and gas outsourced accounting firms list by country and city is linked on this page.

Which city has the most oil and gas outsourced accounting firms?

Houston leads with 206 headquartered companies, followed by Calgary (112) and Sao Paulo (102).

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 12,324 verified decision-maker contacts tracked across these 8,488 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 21, 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.