Company lists · Data refreshed September 2026
Top 25 Sustainability consultants based in Ireland
RevenueBase identified 198 company matches for sustainability consultants associated with Ireland as of September 2026 and tracks 3,174 professional contacts across them, including 1,297 with verified work emails. Dublin is the largest hub.
This list covers company matches for sustainability consultants associated with Ireland, 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 22, 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.
The 25 largest sustainability consultants based in Ireland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 284 contacts → | ||||
Exact match “Nicholas O'Dwyer Ltd, Consulting Engineers, provide water engineering, environmental engineering and civil and structural engineering services to public and private sector clients.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 2 | 241 contacts → | ||||
Exact match “OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 3 | 210 contacts → | ||||
Exact match “MKO is Ireland’s largest Planning and Environmental consultancy.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 4 | 178 contacts → | ||||
Exact match “DBFL is a fully Irish-owned firm specializing in the planning, engineering design and delivery within the property, infrastructure, environmental & energy sectors.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 5 | 116 contacts → | ||||
Exact match “Fehily Timoney and Company is a Irish civil and environmental, engineering, scientific and planning consultancy specialising in the areas of Sustainable Infrastructure, Planning…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 6 | 100 contacts → | ||||
Exact match “Engineering Firm of the Year 2025 - Engineering Excellence Awards 2025 Great Place To Work 2025-2026 accredited IN2 is a modern building services and environmental engineering…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 7 | 99 contacts → | ||||
Exact match “We are a multi-disciplinary ESG, Technical Advisory and digitalisation consultancy with specialist expertise in the real estate, property and construction sectors.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 8 | 99 contacts → | ||||
Exact match “Waterman Moylan is a leading engineering and environmental consultancy providing specialist services to our clients in the property, infrastructure and environment markets in…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 9 | 48 contacts → | ||||
Exact match “Developing a workforce ready to meet today’s sustainability needs has never been more important.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 10 | 47 contacts → | ||||
Exact match “Axiseng Consulting Engineers is a premier independent building services consulting engineering practice, founded in 2004 and celebrating 20 years of excellence in delivering…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 11 | 42 contacts → | ||||
Exact match “Climeaction Cork & Boston | B Corp Certified | ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 12 | 37 contacts → | ||||
Exact match “ERINN Innovation: Guiding Impactful Research for a Sustainable Future Founded in 2017, ERINN Innovation blossomed from AquaTT UETP CLG's enduring legacy of championing research…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 13 | 32 contacts → | ||||
Exact match “We are a global gifting and sustainable merchandise consultancy.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 14 | 32 contacts → | ||||
Exact match “Complex operations made simple.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 15 | 24 contacts → | ||||
Exact match “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 16 | 22 contacts → | ||||
Exact match “OMC Group, we provide a seamless, multidisciplinary consultancy service, specialising in engineering, design, and compliance solutions for commercial projects.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 17 | 22 contacts → | ||||
Exact match “Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 18 | 21 contacts → | ||||
Exact match “Burke-Kennedy Doyle Architects is one of Ireland’s leading architectural practices and has been a key player in the provision of innovative and professional architectural design…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 19 | 21 contacts → | ||||
Exact match “Climate change, ESG requirements and the transition to a low-carbon economy are reshaping the future of real estate.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 20 | 20 contacts → | ||||
Exact match “AQUAFACT, part of APEM Group, is an environmental consultancy established in 1986.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 21 | 20 contacts → | ||||
Exact match “Founded in 1994, Antaris is an independent, Irish-owned consultancy and training firm with expertise in ISO Management Systems, Environment, Energy, Sustainability and Climate…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 22 | 19 contacts → | ||||
Exact match “Native Events is Ireland’s leading sustainable event production company.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 23 | 18 contacts → | ||||
Exact match “Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 24 | 17 contacts → | ||||
Exact match “Providing expert design, energy consulting & training in high performance buildings since 1993.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 25 | 16 contacts → | ||||
Exact match “FKP Architects is a Dublin-based firm practicing Architecture and project management.” Recorded in the RevenueBase company graph · Sep 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 “sustainability consultants”. 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 198 sustainability consultants based in Ireland
See the full list, filter by size, metro and specialty, and access 1,297 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Sustainability consultants based in Ireland at a glance
As of Sep 22, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 198 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 Ireland whose business descriptions match “sustainability consultants” 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 1,297 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 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.
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 “sustainability consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many sustainability consultants are there based in Ireland?
RevenueBase identified 198 company matches for sustainability consultants associated with Ireland 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?
Nicholas O'dwyer LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most sustainability consultants?
Dublin leads with 55 company records, followed by Cork (13) and Galway (9).
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 1,297 professional contacts with verified work emails tracked across these 198 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 22, 2026.
Ready to reach these companies? Verified emails and direct dials for all 198 sustainability consultants based in Ireland. Start with a free account, no credit card.
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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.
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Company intelligence · public preview
Top 25 sustainability consultants based in Ireland
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 198 matching company records for sustainability consultants based in Ireland, with 3,174 tracked contacts and 1,297 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 sustainability consultants based in Ireland
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Nicholas O'dwyer LTDnodwyer.comHQ: Dublin, IrelandReported employees: 201-500 | Dublin, Ireland | 201-500 | Exact match | 284 contacts → |
“Nicholas O'Dwyer Ltd, Consulting Engineers, provide water engineering, environmental engineering and civil and structural engineering services to public and private sector clients.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  O'connor Sutton Croninocsc.ieHQ: Dublin, IrelandReported employees: 201-500 | Dublin, Ireland | 201-500 | Exact match | 241 contacts → |
“OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  MKOmkoireland.ieHQ: Galway, IrelandReported employees: 201-500 | Galway, Ireland | 201-500 | Exact match | 210 contacts → |
“MKO is Ireland’s largest Planning and Environmental consultancy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 178 contacts → |
“DBFL is a fully Irish-owned firm specializing in the planning, engineering design and delivery within the property, infrastructure, environmental & energy sectors.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Fehily Timoney And Companyfehilytimoney.ieHQ: Cork, IrelandReported employees: 51-200 | Cork, Ireland | 51-200 | Exact match | 116 contacts → |
“Fehily Timoney and Company is a Irish civil and environmental, engineering, scientific and planning consultancy specialising in the areas of Sustainable Infrastructure, Planning…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  In2 Engineeringin2.ieHQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 100 contacts → |
“Engineering Firm of the Year 2025 - Engineering Excellence Awards 2025 Great Place To Work 2025-2026 accredited IN2 is a modern building services and environmental engineering…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Catalystcatalyst-group.comHQ: Dublin 4, IrelandReported employees: 51-200 | Dublin 4, Ireland | 51-200 | Exact match | 99 contacts → |
“We are a multi-disciplinary ESG, Technical Advisory and digitalisation consultancy with specialist expertise in the real estate, property and construction sectors.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Waterman Moylan Consulting Engineerswaterman-moylan.ieHQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 99 contacts → |
“Waterman Moylan is a leading engineering and environmental consultancy providing specialist services to our clients in the property, infrastructure and environment markets in…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  20fifty Partners20fiftypartners.comHQ: Limerick, IrelandReported employees: 51-200 | Limerick, Ireland | 51-200 | Exact match | 48 contacts → |
“Developing a workforce ready to meet today’s sustainability needs has never been more important.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Axisengaxiseng.ieHQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 47 contacts → |
“Axiseng Consulting Engineers is a premier independent building services consulting engineering practice, founded in 2004 and celebrating 20 years of excellence in delivering…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Climeactionclimeaction.comHQ: Cork, IrelandReported employees: 11-50 | Cork, Ireland | 11-50 | Exact match | 42 contacts → |
“Climeaction Cork & Boston | B Corp Certified | ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Erinn Innovationerinn.eu HQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 37 contacts → |
“ERINN Innovation: Guiding Impactful Research for a Sustainable Future Founded in 2017, ERINN Innovation blossomed from AquaTT UETP CLG's enduring legacy of championing research…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | MACEmacepromotions.com HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 32 contacts → |
“We are a global gifting and sustainable merchandise consultancy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  KSN Energyksn.ieHQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 32 contacts → |
“Complex operations made simple.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Lawler Sustainabilitylawlersustainability.comHQ: Kilkenny, IrelandReported employees: 11-50 | Kilkenny, Ireland | 11-50 | Exact match | 24 contacts → |
“Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  OMComcgroup.ieHQ: Galway, IrelandReported employees: 11-50 | Galway, Ireland | 11-50 | Exact match | 22 contacts → |
“OMC Group, we provide a seamless, multidisciplinary consultancy service, specialising in engineering, design, and compliance solutions for commercial projects.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Enviroguide A DNV Companyenviroguide.ieHQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 22 contacts → |
“Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 21 contacts → |
“Burke-Kennedy Doyle Architects is one of Ireland’s leading architectural practices and has been a key player in the provision of innovative and professional architectural design…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  KSN Horizonksnhorizon.comHQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 21 contacts → |
“Climate change, ESG requirements and the transition to a low-carbon economy are reshaping the future of real estate.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Aquafactaquafact.ieHQ: Galway, IrelandReported employees: 1-10 | Galway, Ireland | 1-10 | Exact match | 20 contacts → |
“AQUAFACT, part of APEM Group, is an environmental consultancy established in 1986.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Antaris Consultingantarisconsulting.comHQ: Limerick, IrelandReported employees: 11-50 | Limerick, Ireland | 11-50 | Exact match | 20 contacts → |
“Founded in 1994, Antaris is an independent, Irish-owned consultancy and training firm with expertise in ISO Management Systems, Environment, Energy, Sustainability and Climate…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Native Eventsnativeevents.ieHQ: Dublin, IrelandReported employees: 1-10 | Dublin, Ireland | 1-10 | Exact match | 19 contacts → |
“Native Events is Ireland’s leading sustainable event production company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Plan Energyplanenergy.comHQ: Sligo, IrelandReported employees: 11-50 | Sligo, Ireland | 11-50 | Exact match | 18 contacts → |
“Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Mosartmosart.ie HQ: IrelandReported employees: 11-50 | Ireland | 11-50 | Exact match | 17 contacts → |
“Providing expert design, energy consulting & training in high performance buildings since 1993.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | FKP Architectsfkp.ie HQ: Dublin 2, IrelandReported employees: 11-50 | Dublin 2, Ireland | 11-50 | Exact match | 16 contacts → |
“FKP Architects is a Dublin-based firm practicing Architecture and project management.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 198 company matches
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Sustainability consultants: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
197 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 198 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for sustainability consultants?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many sustainability consultants did RevenueBase find based in Ireland?
The saved snapshot records 198 matching company records, 3,174 tracked contacts and 1,297 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Browse the directory
Cite this list
RevenueBase Data Team. Top 25 sustainability consultants based in Ireland. Snapshot: September 22, 2026. https://revenuebase.ai/companies/sustainability-consultants/ireland.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
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- New lists
- Sustainability consultants based in Buenos Aires, Argentina
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Company intelligence · public preview
Top 25 sustainability consultants based in Ireland
RevenueBase records 198 matching company records for sustainability consultants based in Ireland, with 3,174 tracked contacts and 1,297 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 sustainability consultants based in Ireland
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Nicholas O'dwyer LTDnodwyer.com HQ: Dublin, IrelandReported employees: 201-500 | Dublin, Ireland | 201-500 | Exact match | 284 contacts → |
“Nicholas O'Dwyer Ltd, Consulting Engineers, provide water engineering, environmental engineering and civil and structural engineering services to public and private sector clients.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | O'connor Sutton Croninocsc.ie HQ: Dublin, IrelandReported employees: 201-500 | Dublin, Ireland | 201-500 | Exact match | 241 contacts → |
“OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | MKOmkoireland.ie HQ: Galway, IrelandReported employees: 201-500 | Galway, Ireland | 201-500 | Exact match | 210 contacts → |
“MKO is Ireland’s largest Planning and Environmental consultancy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 178 contacts → |
“DBFL is a fully Irish-owned firm specializing in the planning, engineering design and delivery within the property, infrastructure, environmental & energy sectors.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Fehily Timoney And Companyfehilytimoney.ie HQ: Cork, IrelandReported employees: 51-200 | Cork, Ireland | 51-200 | Exact match | 116 contacts → |
“Fehily Timoney and Company is a Irish civil and environmental, engineering, scientific and planning consultancy specialising in the areas of Sustainable Infrastructure, Planning…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | In2 Engineeringin2.ie HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 100 contacts → |
“Engineering Firm of the Year 2025 - Engineering Excellence Awards 2025 Great Place To Work 2025-2026 accredited IN2 is a modern building services and environmental engineering…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Catalystcatalyst-group.com HQ: Dublin 4, IrelandReported employees: 51-200 | Dublin 4, Ireland | 51-200 | Exact match | 99 contacts → |
“We are a multi-disciplinary ESG, Technical Advisory and digitalisation consultancy with specialist expertise in the real estate, property and construction sectors.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Waterman Moylan Consulting Engineerswaterman-moylan.ie HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 99 contacts → |
“Waterman Moylan is a leading engineering and environmental consultancy providing specialist services to our clients in the property, infrastructure and environment markets in…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | 20fifty Partners20fiftypartners.com HQ: Limerick, IrelandReported employees: 51-200 | Limerick, Ireland | 51-200 | Exact match | 48 contacts → |
“Developing a workforce ready to meet today’s sustainability needs has never been more important.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Axisengaxiseng.ie HQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 47 contacts → |
“Axiseng Consulting Engineers is a premier independent building services consulting engineering practice, founded in 2004 and celebrating 20 years of excellence in delivering…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Climeactionclimeaction.com HQ: Cork, IrelandReported employees: 11-50 | Cork, Ireland | 11-50 | Exact match | 42 contacts → |
“Climeaction Cork & Boston | B Corp Certified | ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Erinn Innovationerinn.eu HQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 37 contacts → |
“ERINN Innovation: Guiding Impactful Research for a Sustainable Future Founded in 2017, ERINN Innovation blossomed from AquaTT UETP CLG's enduring legacy of championing research…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | MACEmacepromotions.com HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 32 contacts → |
“We are a global gifting and sustainable merchandise consultancy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | KSN Energyksn.ie HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 32 contacts → |
“Complex operations made simple.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Lawler Sustainabilitylawlersustainability.com HQ: Kilkenny, IrelandReported employees: 11-50 | Kilkenny, Ireland | 11-50 | Exact match | 24 contacts → |
“Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | OMComcgroup.ie HQ: Galway, IrelandReported employees: 11-50 | Galway, Ireland | 11-50 | Exact match | 22 contacts → |
“OMC Group, we provide a seamless, multidisciplinary consultancy service, specialising in engineering, design, and compliance solutions for commercial projects.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Enviroguide A DNV Companyenviroguide.ie HQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 22 contacts → |
“Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | HQ: Dublin, IrelandReported employees: 51-200 | Dublin, Ireland | 51-200 | Exact match | 21 contacts → |
“Burke-Kennedy Doyle Architects is one of Ireland’s leading architectural practices and has been a key player in the provision of innovative and professional architectural design…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | KSN Horizonksnhorizon.com HQ: Dublin, IrelandReported employees: 11-50 | Dublin, Ireland | 11-50 | Exact match | 21 contacts → |
“Climate change, ESG requirements and the transition to a low-carbon economy are reshaping the future of real estate.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Aquafactaquafact.ie HQ: Galway, IrelandReported employees: 1-10 | Galway, Ireland | 1-10 | Exact match | 20 contacts → |
“AQUAFACT, part of APEM Group, is an environmental consultancy established in 1986.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Antaris Consultingantarisconsulting.com HQ: Limerick, IrelandReported employees: 11-50 | Limerick, Ireland | 11-50 | Exact match | 20 contacts → |
“Founded in 1994, Antaris is an independent, Irish-owned consultancy and training firm with expertise in ISO Management Systems, Environment, Energy, Sustainability and Climate…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Native Eventsnativeevents.ie HQ: Dublin, IrelandReported employees: 1-10 | Dublin, Ireland | 1-10 | Exact match | 19 contacts → |
“Native Events is Ireland’s leading sustainable event production company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Plan Energyplanenergy.com HQ: Sligo, IrelandReported employees: 11-50 | Sligo, Ireland | 11-50 | Exact match | 18 contacts → |
“Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Mosartmosart.ie HQ: IrelandReported employees: 11-50 | Ireland | 11-50 | Exact match | 17 contacts → |
“Providing expert design, energy consulting & training in high performance buildings since 1993.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | FKP Architectsfkp.ie HQ: Dublin 2, IrelandReported employees: 11-50 | Dublin 2, Ireland | 11-50 | Exact match | 16 contacts → |
“FKP Architects is a Dublin-based firm practicing Architecture and project management.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 198 company matches
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Sustainability consultants: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
197 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 198 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for sustainability consultants?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many sustainability consultants did RevenueBase find based in Ireland?
The saved snapshot records 198 matching company records, 3,174 tracked contacts and 1,297 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 sustainability consultants based in Ireland. Snapshot: September 22, 2026. https://revenuebase.ai/companies/sustainability-consultants/ireland.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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