A sustainability portfolio should show what you can do for the role you want: a small selection of work samples, your specific contribution, and enough detail for someone to check your reasoning. Start with one well-explained project. You can add more as you gain experience.
Choose work samples that match the vacancy
Read a few relevant job descriptions and identify the tasks they share. A reporting role may need evidence of data checks and documentation. A procurement role may need a supplier questionnaire and a way to compare incomplete responses. A manager role may need a project plan and an example of working across departments.
Use your own work, coursework, volunteering, or a clearly labelled practice exercise. Get permission before sharing employer or client material. If permission is unavailable, build an independent example with public or synthetic data instead of disguising confidential records.
| Role you want | Possible work sample | What to explain |
|---|---|---|
| ESG reporting | A disclosure checklist and a data-quality log | Which source supports each entry, who owns missing data, and what remains unresolved |
| Climate or carbon accounting | A calculation workbook using public or synthetic activity data | Boundary, units, emission-factor source and year, assumptions, checks, and exclusions |
| Sustainable procurement | A supplier questionnaire and comparison table | Why each question matters and how missing or incomparable answers affect your decision |
| Sustainability management | A project brief, stakeholder map, and delivery plan | Who makes decisions, dependencies, milestones, and how you would monitor progress |
These are suggested exercises, not projects completed by real candidates. Choose examples you can discuss honestly in an interview. Browse the reporting jobs, procurement jobs, and manager jobs to check which tasks recur in current listings.
Give each project a short, checkable case study
Use the same structure for each sample so a recruiter can understand it quickly:
- Context: the question, intended user, and scope of the work.
- Your contribution: what you personally researched, calculated, organised, or wrote. Distinguish your work from the team’s work.
- Method: sources, tools, assumptions, and checks, with links where possible.
- Deliverable: a readable extract, screenshot, workbook, presentation, or short demonstration.
- Result and limits: what the work established, what was implemented, and what you could not verify.
For a practice project, say so at the top: “Independent exercise using synthetic electricity-use data; no real organisation or implemented reduction.” Explain the reasoning without claiming an employer used the work.
For a real project, distinguish a forecast from a measured outcome. A proposed energy-saving action is not an achieved emissions reduction. Include a baseline, period, and calculation method only when you have the records and permission to support them.
Show technical reasoning without pretending to cover everything
A carbon workbook is useful when someone can follow it. Label activity data and emission factors, keep units consistent, record the factor version, and show how you checked the result. The GHG Protocol standards and guidance are primary references for organisational and value-chain emissions accounting. Link the relevant guidance you actually used rather than adding a framework name as decoration.
For a reporting exercise, use the GRI Standards as one possible source, where relevant to the project. Identify the exact standard and version you consulted. A sample disclosure is an exercise in documenting evidence; it does not demonstrate that a company complies with every applicable reporting obligation.
You do not need a carbon calculation, a biodiversity assessment, and a transition strategy in the same portfolio. A focused, defensible sample is more useful than several topics you cannot explain.
Include evidence of working with people
Include both work samples and evidence of coordination when the vacancy asks for them. A calculation alone may not show how you worked with the people supplying its inputs.
A workshop agenda, decision log, stakeholder map, or short presentation can show how you communicated a recommendation. Explain the audience, the choice they faced, and how you handled a disagreement or missing information. Remove names and personal details unless you have permission to publish them.
List relevant training and certifications separately from project outcomes. A course shows learning; the work sample shows how you applied it.
Make the portfolio easy to open and discuss
A simple website, PDF, or shared document can work. Put a brief professional summary and your strongest relevant sample first. Provide a readable preview before asking someone to open a large workbook or watch a video. Check access permissions and links in a signed-out browser.
Ask a peer or mentor whether they can identify your contribution and understand the result without your explanation. Improve unclear sections before adding more material. After a meaningful new project, replace weaker samples and update their dates.
Link the relevant case study from your sustainability CV. In an application, point to the part that addresses the vacancy rather than sending an undirected folder. If you are considering project-based work, the freelance ESG guide explains how to turn a demonstrated skill into a defined client deliverable.
Sources checked on 20 October 2026. Examples above are templates to adapt, not testimonials or verified candidate results.