Research Sources & Methodology
Transparent methodology and comprehensive data sources behind our sustainability career research and salary analysis
📚 Research sources verified: September 2025 | Next verification: February 2026
🔬 Research Methodology
Data Collection
We aggregate salary and market data from 100+ verified sources including major job platforms, government statistics, and industry reports across USA, UK, and EU markets.
Validation & Verification
All data points are cross-referenced across multiple sources and validated against industry benchmarks to ensure accuracy and reliability.
Regional Analysis
Market data is segmented by region (USA, UK, EU) and adjusted for purchasing power parity, cost of living, and local market conditions.
Trend Analysis
Historical data is analysed to identify trends, seasonal variations, and emerging patterns in sustainability career markets and AI integration.
Expert Review
All analysis is reviewed by our B Corp certified sustainability recruitment specialists with 15+ years of industry experience.
Continuous Updates
Data is updated monthly with new sources and quarterly with comprehensive market analysis to ensure currency and relevance.
📊 Primary Data Sources
Comprehensive collection of verified data sources across salary platforms, industry reports, government statistics, and professional organisations.
Salary Data Platforms
- Glassdoor UK - Global salary database
- PayScale - Compensation data
- Indeed UK Salary Guide
- Salary.com - Market data
- LinkedIn Salary Insights
- Levels.fyi - Tech compensation
- Comparably - Company culture & pay
- Hays Salary Guide (UK/EU)
- Michael Page Salary Benchmark
- Reed Salary Checker (UK)
- Totaljobs Salary Centre (UK)
- CV-Library Salary Guide
- StepStone Salary Report (EU)
- Robert Half Salary Guide
- ZipRecruiter Salary Database
Industry Reports
- McKinsey Global Institute
- PwC ESG & Sustainability Reports
- Deloitte Climate & Sustainability
- KPMG ESG Research
- EY Sustainability Research
- Bain & Company Sustainability
- Boston Consulting Group Climate
- World Economic Forum Reports
- International Energy Agency (IEA)
- International Renewable Energy Agency (IRENA)
- Climate Policy Initiative
- Green Finance Institute
- Sustainable Brands Insights
- GreenBiz Intelligence
- Carbon Trust Research
Government & Official Data
- US Bureau of Labor Statistics
- UK Office for National Statistics
- European Commission Data
- US Department of Energy
- UK Government Green Jobs Data
- Eurostat - European Statistics
- OECD Employment Database
- International Labour Organization (ILO)
- US Environmental Protection Agency
- UK Committee on Climate Change
- European Environment Agency
- Statistics Canada Green Jobs
- Australian Bureau of Statistics
- German Federal Statistical Office
- French National Institute of Statistics
Professional Organisations
- CFA Institute ESG Research
- Global Reporting Initiative (GRI)
- SASB Standards (now part of IFRS Foundation)
- IFRS Foundation - ISSB Standards
- Task Force on Climate-related Financial Disclosures
- International Federation of Accountants (IFAC)
- Association of Chartered Certified Accountants (ACCA)
- Chartered Institute of Management Accountants (CIMA)
- Institute of Environmental Management & Assessment
- Society for Human Resource Management (SHRM)
- Chartered Institute of Personnel & Development
- Net Impact Professional Network
Academic & Research Institutions
- Cambridge Institute for Sustainability Leadership
- Stanford Woods Institute
- Yale Center for Environmental Law & Policy
- MIT Climate Portal
- Harvard Environmental Economics Program
- Oxford Smith School of Enterprise & Environment
- London School of Economics Grantham Institute
- Imperial College London Business School
- INSEAD Social Innovation Centre
- Wharton School ESG Research
- Chicago Booth School Sustainability
- Berkeley Haas Sustainable Business
- NYU Stern Center for Sustainable Business
- Toronto Rotman Sustainability
- IESE Business School Sustainability
Job Platforms & Career Data
- Climatebase - Climate tech jobs
- Trellis - Sustainability careers
- The Impact Job
- GreenJobs UK
- EnvironmentJob UK
- SustainabilityJobs.com
- Net Impact Job Board
- GreenBiz Jobs
- Work on Climate
- 80,000 Hours Job Board
- Escape the City
- B Corp Job Board
- CSR Jobs
- Energy Jobline
- Renewable Energy Jobs
- CleanTech Jobs
- Environmental Finance Jobs
- Carbon Trust Careers
- WWF Careers
- Greenpeace Jobs