Company lists · Data refreshed September 2026

Top 25 Energy consultancies based in Sydney, Australia

Name: Energy consultancies based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 165 companies tracked

RevenueBase identified 165 energy consultancies headquartered in Sydney, Australia as of September 2026 and tracks 36,415 professional contacts across them, including 13,256 with verified work emails. Sydney is the largest hub.

This list covers energy consultancies headquartered in Sydney, Australia, 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.

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

165Companies

36,415Contacts tracked

13,256Verified emails

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The 25 largest energy consultancies based in Sydney, Australia

Ranked by team size

Top 25 of 165 energy consultancies based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy consultancies: 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	Worley	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	10001+	34,763 contacts →
	Partial evidence “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Source: RevenueBase Database · checked Sep 21, 2026
2	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	262 contacts →
	Partial evidence “Established in 1996, JBS & G is one of Australia’s leading environmental consultancies with offices in Sydney, Melbourne, Perth, Adelaide, Brisbane, Canberra, Darwin, Wollongong…” Source: RevenueBase Database · checked Sep 21, 2026
3	ECO Logical Australia PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	211 contacts →
	Indirect evidence “We exist to empower people to make a difference.” Source: RevenueBase Database · checked Sep 21, 2026
4	ZEMBL	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	133 contacts →
	Partial evidence “We help businesses buy better energy, saving them time and improving their bottom line.” Source: RevenueBase Database · checked Sep 21, 2026
5	Energy Action	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	77 contacts →
	Partial evidence “At Energy Action, we help your business cut energy costs and reduce emissions, paving the way to a net zero future without breaking the bank.” Source: RevenueBase Database · checked Sep 21, 2026
6	ICA Partners	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	48 contacts →
	Indirect evidence “ICA Partners is one of Australia’s leading boutique advisory firms.” Source: RevenueBase Database · checked Sep 21, 2026
7	Construction Services And Infrastructure	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	42 contacts →
	Indirect evidence “Construction Services & Infrastructure (CSI) is a leading independent Project Management, Building Services Management and Commissioning consultancy for the commercial…” Source: RevenueBase Database · checked Sep 21, 2026
8	Endgame Analytics	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “In a world of complexity and big decisions, there are choices that are simple and clear, yet flawed.” Source: RevenueBase Database · checked Sep 21, 2026
9	Nutbrook Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “Nutbrook Group was established with the objective of integrating a values-driven approach to Consultancy, Engineering and Project Management services.” Source: RevenueBase Database · checked Sep 21, 2026
10	Intelligent Energy Systems IES	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “Trusted advisors and technology leaders in energy markets in the Asia-Pacific region with over four decades of experience helping shape energy transition and opportunities for…” Source: RevenueBase Database · checked Sep 21, 2026
11	Edsico Management	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	23 contacts →
	Indirect evidence “With decades of experience, EDSICO Management provides fully integrated range of management consultancy services.” Source: RevenueBase Database · checked Sep 21, 2026
12	Leading Edge Energy	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “What we do Leading Edge Energy is an integrated energy management consultancy powered by the latest technology to offer market-leading energy solutions for your business.” Source: RevenueBase Database · checked Sep 21, 2026
13	Nettzero	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “NettZero is a 100% Australian owned and operated Sustainability Consultancy which caters to a multitude of sustainability demands concerning on Businesses.” Source: RevenueBase Database · checked Sep 21, 2026
14	Cutlermerz	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “We are a specialist management, economic and engineering consultancy to the power and energy sector.” Source: RevenueBase Database · checked Sep 21, 2026
15	Energylink Services PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “EnergyLink Services is a multi-disciplinary, specialist, energy and carbon consultancy and project developer.” Source: RevenueBase Database · checked Sep 21, 2026
16	Renewco Solar	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	16 contacts →
	Indirect evidence “At RenewCo Solar we pride ourselves on the work we do.” Source: RevenueBase Database · checked Sep 21, 2026
17	Energy Global Company	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “Established in March 2017, Energy Global Company Pty Ltd (EGC) has been building and providing consulting services to retail energy businesses across the globe.” Source: RevenueBase Database · checked Sep 21, 2026
18	Calibrate Consulting	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “Calibrate Consulting is a leading boutique claims consultancy providing specialist services across Australia, New Zealand, and the Asia-Pacific.” Source: RevenueBase Database · checked Sep 21, 2026
19	Fichtner Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “The Fichtner Group is one of the leading independent engineering consultancy firms in the world.” Source: RevenueBase Database · checked Sep 21, 2026
20	GWA Consultants Australia PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “UNDERSTANDING THE PROBLEM & IDENTIFYING REAL SOLUTIONS GWA Consultants is a specialist Mechanical Engineering and Energy Consultancy firm with over 25 years of experience in the…” Source: RevenueBase Database · checked Sep 21, 2026
21	100 Renewables	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	12 contacts →
	Indirect evidence “100% Renewables is a national consultancy specialising in the development of Climate Action Strategies for business, including pathways to net zero emissions.” Source: RevenueBase Database · checked Sep 21, 2026
22	Pt&i	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “We are a professional engineering consultancy offering multi-sector expertise to define what is possible and practical to optimise the benefits of systems or technology deployment.” Source: RevenueBase Database · checked Sep 21, 2026
23	Hypercube Scientific	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	11 contacts →
	Partial evidence “Hypercube Scientific is a specialised consultancy providing advanced analytical and simulation services for the resources, energy, agriculture and infrastructure sectors.” Source: RevenueBase Database · checked Sep 21, 2026
24	E-Green Electrical	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	11 contacts →
	Partial evidence “E-Green Electrical are the pioneers in energy efficiency.” Source: RevenueBase Database · checked Sep 21, 2026
25	Intellergy	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	10 contacts →
	Partial evidence “Intelligent Energy Solutions for Energy, Utilities and Infrastructure” 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: energy consultancies. 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 energy consultancies.
Partial evidence: Its own public description names part of energy consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy consultancies. 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 165 energy consultancies based in Sydney, Australia

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Energy consultancies based in Sydney, Australia at a glance

As of Sep 21, 2026

36.4%Verified-email coverage

220.7Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

116

11-50

51-200

201-500

10001+

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 165 companies.

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 energy consultancies, 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.
What qualifies: Companies headquartered in Sydney, Australia whose own description of what they do matches “energy consultancies”. 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 energy consultancies), 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 energy consultancies, and records with no verified work email. Companies headquartered outside Sydney 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 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, 13,256 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.

Energy consultancies by metro in Australia

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 energy consultancies, 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 energy consultancies are there based in Sydney, Australia?

RevenueBase identified 165 energy consultancies headquartered in Sydney, Australia 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?

Worley, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most energy consultancies?

Sydney leads with 165 headquartered companies, followed by Melbourne (146) and Perth (106).

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 13,256 verified decision-maker contacts tracked across these 165 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.