MacArthur Green
MacArthur Green is a Glasgow-based specialist environmental consultancy providing ornithology, ecology, peat surveying, and carbon management services to UK renewable energy developers and government statutory bodies, now fully integrated into SLR Consulting as of September 2025.
- Company typePrivate
- Founded2009
- HeadquartersGlasgow, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What MacArthur Green does
MacArthur Green is a Glasgow-based specialist environmental consultancy founded in spring 2009 by David MacArthur, providing ornithology, ecology, and peat survey services primarily to UK renewable energy developers and government statutory bodies. Core offerings include marine and terrestrial ornithological assessments (population viability analysis, Habitats Regulations Appraisals, collision risk modelling, cumulative impact assessments), ecological surveys (Phase 1 Habitat, National Vegetation Classification, GWDTE, protected species), peat surveys and management plans for wind farm sites, carbon management consulting, and a Marine Renewables Research Programme that has co-funded nine PhD studentships since 2011. The firm applies bespoke statistical and mathematical ecological modelling under the leadership of Professor Jason Matthiopoulos to build population response models for anthropogenic change.
The firm operates a B2B professional services model with sales-led direct engagement targeting enterprise renewable developers (onshore/offshore wind, tidal, transmission networks) and government agencies including NatureScot, Marine Scotland, and the former Scottish Natural Heritage. Revenue is generated through project-based consulting fees for environmental impact assessments, with no publicly disclosed pricing and a "Brand Promise Guarantee" that allows dissatisfied clients to pay only what they consider reasonable. The team of approximately 40 specialists includes internationally renowned academics (Professor Bob Furness, Professor Matthiopoulos), former government regulators (Marine Directorate of the Scottish Government, JNCC), and chartered environmentalists, headquartered at 93 South Woodside Road, Glasgow.
As of September 2025, MacArthur Green completed full integration into SLR Consulting, a global environmental and advisory firm, while retaining the MacArthur Green brand identity within the SLR group. The firm has maintained a carbon-negative, biodiversity-positive operating model since at least 2019, with Science Based Targets initiative-approved emissions reduction targets consistent with limiting warming to 1.5°C, funded operationally by a 46-hectare woodland at Lochgair, Argyll planted with 30,000 native trees (transferring ownership to Lochgair Estates in 2024 while retaining lead sponsorship).
MacArthur Green firmographics
Firmographics- Name
- MacArthur Green
- Legal name
- MacArthur Green
- Website
- https://macarthurgreen.com
- Company type
- Private
- Founded year
- 2009
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- MacArthur Green is a Glasgow-based specialist environmental consultancy providing ornithology, ecology, peat surveying, and carbon management services to UK renewable energy developers and government statutory bodies, now fully integrated into SLR Consulting as of September 2025.
- Ownership category
- akta.pro rank
MacArthur Green industry classification
Industry- Product category
- Environmental Consulting
- NAICS
- Environmental Consulting Services (541620)
- SIC
- Services-Commercial Physical & Biological Research (8731)
- akta.pro primary industry
- Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory (EUAMANAB)
- akta.pro secondary industry
- Urban & Community Reforestation / Street Tree Planting (AFAMACAL)
Keywords
Where MacArthur Green is headquartered
LocationHeadquarters
- HQ city
- Glasgow
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
MacArthur Green business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Others
Revenue model
- Environmental Consulting Services: Professional consulting services providing ecology and ornithology assessments, surveys, and advice for renewable energy projects, transmission networks, and nature conservation. Revenue generated through project-based consulting fees for environmental impact assessments, Habitats Regulations Appraisals, and ecological surveys.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
MacArthur Green product offering
Product offeringCore offering
MacArthur Green is a specialist environmental consultancy providing ornithology, ecology, peat surveying, and environmental impact assessment services to renewable energy developers, transmission network operators, and government agencies. The firm's core work focuses on delivering focused and robust ecology and ornithology assessments and advice to ensure these disciplines do not cause problems or delays for projects in planning, alongside bespoke ecological modelling, Habitats Regulations Appraisals, collision risk modelling, and a marine renewables PhD research programme.
Product overview
MacArthur Green is a specialist environmental consultancy providing expert ornithology and ecology assessment services for renewable energy, transmission networks, and nature conservation projects. The company's portfolio consists of six interconnected service offerings: Ornithology Services (covering marine and terrestrial bird assessments), Ecology Services (habitat surveys and protected species work), Peat Services (surveys and management plans), the Marine Renewables Research Programme (PhD research support), Carbon Management Services, and Environmental Impact Assessment Support. As part of SLR Consulting following September 2025, MacArthur Green operates from Glasgow and serves developers, government agencies, and statutory bodies with a biodiversity positive, carbon conscious business model.
Differentiator
Problem solved
Functional benefit
Products and services
- Ornithology Services
Quantifiable outcome
- Science Based Targets initiative approved emissions reduction targets consistent with 1.5°C Paris Agreement goals
- +2 more outcomes
Companies that use MacArthur Green
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles2 records
MacArthur Green technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
MacArthur Green partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered minor and core.
- Lochgair EstatesminorIn 2024, ownership of Lochgair woodland transferred to Lochgair Estates. MacArthur Green continues as lead sponsor of woodland and biodiversity management, funding all woodland and biodiversity management activities.
- SeawildingcoreCharity partnership for marine habitat restoration. Jointly awarded £10,549 SMEEF grant to restore native oysters to Loch Gair. MacArthur Green purchased land and foreshore at Lochgair in 2016. Partnership involves community-led marine habitat restoration.
- Glasgow UniversitycoreAcademic research partnership supporting PhD studentships in marine renewables and seabirds. Partners on NERC CASE studentships with Professor Jason Matthiopoulos and Dr David Bailey as supervisors.
- Natural Environment Research Council (NERC)coreNERC CASE studentships supporting postgraduate research in marine renewables ornithology. Multiple PhD studentships co-funded.
- Scottish Natural Heritage (SNH)coreResearch partnership through SNH/MASTS Scholarship supporting PhD research on ecology of black guillemots in relation to Marine Protected Areas and tidal stream arrays.
- UHI (ERI Thurso)coreAcademic partner for PhD research on ecology of black guillemots in relation to Marine Protected Areas and tidal stream arrays, supervised by Dr Liz Masden.
- Leeds UniversitycoreAcademic partnership for NERC CASE studentship on demography of gannets on Bass Rock in relation to offshore wind farms, supervised by Professor Keith Hamer.
- Vattenfallcore2nd CASE partner on NERC CASE studentship with Leeds University for gannet demography research. Also selected MacArthur Green's auk research project for European Offshore Wind Deployment Centre (EOWDC) multi-million pound research programme in Aberdeen Bay.
- MASTS (Marine Alliance for Science and Technology for Scotland)corePartnership for marine renewables research programme supporting PhD studentships and strategic research in marine ornithology.
- European Offshore Wind Deployment Centre (EOWDC)coreAuk research project selected as part of multi-million pound research programme based in Aberdeen Bay, funded by Vattenfall. Project measuring connectivity between auk SPA populations and offshore wind farms.
Scale indicators3 records
Recent moves7 records
Expansion highlights5 records
MacArthur Green competitors and assessment
Company assessmentBroad incumbents
- AECOM: Global infrastructure and environmental consultancy providing environmental impact assessment, permitting, and ecological advisory services across renewables, energy, and major projects worldwide. Overlaps with MacArthur Green on renewable energy EIA and HRA work but operates at much larger scale.
- COWI: Danish-headquartered engineering consultancy with a leading offshore wind practice including environmental impact assessment, ornithology, and consenting. Comparable specialty focus and shares MacArthur Green's tight alignment with European offshore wind development.
- Jacobs: Global professional services firm with a sizeable environmental and energy consulting practice covering renewables, transmission, and consenting. Wins large multi-disciplinary renewable energy framework contracts where MacArthur Green's specialist ornithology niche may be subcontracted or replaced.
- RSK Group: UK-based environmental services and consulting group with substantial ecology, ornithology, and renewables exposure. Competes directly with MacArthur Green in UK renewable energy consenting and offers geographic and disciplinary breadth as a broader incumbent.
- Ramboll: Global engineering consultancy with a strong offshore wind and environmental advisory practice across Europe and North America. Comparable in EIA/HRA capability for renewables and a likely competitor as offshore wind expands beyond UK waters.
- WSP: One of the world's largest engineering and environmental consultancies providing EIA, ecology, and ornithology services as part of its broader renewables and infrastructure portfolio. Competes with MacArthur Green for major renewable energy mandates while offering significantly larger integrated delivery teams.
- Royal HaskoningDHV: International engineering and environmental consultancy with significant renewables and marine ecology capabilities. Competes for offshore wind permitting and EIA work, particularly across European markets where MacArthur Green also seeks to expand.
- SLR Consulting: Global environmental and advisory consultancy operating in 100+ offices across renewables, infrastructure, and natural resources. MacArthur Green's parent company following full integration in September 2025, SLR provides the scale and cross-geography project pipeline that MacArthur Green's specialist UK team can now access.
Direct peers
- Natural Power Consultants: Independent renewables-focused environmental consultancy headquartered in Scotland offering ornithology, ecology, and environmental due diligence for wind, marine, and grid projects. Direct competitor to MacArthur Green in UK onshore and offshore wind impact assessment, with overlapping service portfolio and customer base.
- Arcus Consulting: UK environmental consultancy delivering ornithology, ecology, and planning services to renewables, infrastructure, and transmission developers. Closely comparable specialty/footprint to MacArthur Green in Scottish and wider UK renewable energy consenting work.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights6 records
Customer concentration
MacArthur Green social profiles
Digital presenceMacArthur Green compliance and trust
Trust signalCompliance3 records
MacArthur Green financial estimates
Financial estimateRevenue estimate
Valuation estimate
MacArthur Green leadership team
Management profileNumber of profiles
Profiles8 records
MacArthur Green funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
MacArthur Green M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about MacArthur Green
What does MacArthur Green do?
MacArthur Green is a specialist environmental consultancy providing ornithology, ecology, peat surveying, and environmental impact assessment services to renewable energy developers, transmission network operators, and government agencies. The firm's core work focuses on delivering focused and robust ecology and ornithology assessments and advice to ensure these disciplines do not cause problems or delays for projects in planning, alongside bespoke ecological modelling, Habitats Regulations Appraisals, collision risk modelling, and a marine renewables PhD research programme.
Is MacArthur Green a public or private company?
MacArthur Green is a private company. It is classified as corporate owned and is currently operating.
When was MacArthur Green founded?
MacArthur Green was founded in 2009. It employs 11 to 50 people.
Where is MacArthur Green based?
MacArthur Green is headquartered in Glasgow, United Kingdom, in the Europe region.
How does MacArthur Green make money?
One revenue line is on record: environmental Consulting Services.
Who are MacArthur Green's main competitors?
Broad incumbents on record are AECOM, COWI, Jacobs, RSK Group, Ramboll, WSP, Royal HaskoningDHV and SLR Consulting. Direct peers are Natural Power Consultants and Arcus Consulting.
Does MacArthur Green have an API?
No public API is recorded for MacArthur Green.
What industry is MacArthur Green in?
MacArthur Green's product category is Environmental Consulting. Its primary akta.pro industry code is EUAMANAB, Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory, with a secondary code of AFAMACAL, Urban & Community Reforestation / Street Tree Planting. Its NAICS code is 541620 and its SIC code is 8731.