What a Chief Sustainability Officer does
A Chief Sustainability Officer (CSO) helps an organization make sustainability part of its decisions and operations. The role may cover environmental, social, and governance priorities, but its remit differs by organization, sector, and reporting line. Some CSOs lead a specialist team; others coordinate work across finance, procurement, operations, product, and communications.
The central task is to connect intentions to accountable work. That means clarifying priorities, assigning ownership, setting measures, and explaining progress and limits. A CSO may advise executives and the board, but effective delivery depends on colleagues throughout the organization having clear responsibilities and access to reliable information.
Set priorities and build a workable plan
CSOs help identify which sustainability issues matter most to the organization and its stakeholders, then translate priorities into goals and plans. This can include improving resource efficiency, addressing impacts in products or supply chains, strengthening social practices, or preparing for climate-related risks. Not every role owns every topic, and the plan should reflect the organization’s actual impacts, capabilities, and business context.
A useful plan names an accountable owner, actions, resources, timing, and a way to check progress. It should also make trade-offs visible: for example, a proposed change may reduce one impact while creating cost, operational, or sourcing questions that need review. Linking sustainability considerations to planning and investment discussions helps avoid leaving the work as a standalone communications activity.
Measure performance and support credible reporting
Where measurement is part of the remit, CSOs establish what will be tracked, how boundaries are defined, who supplies the data, and how records will be checked. For greenhouse gas accounting, this may involve activity data, emissions factors, and value-chain information. Other roles may focus more on labor practices, materials, nature, or governance. Carbon accounting is valuable in relevant roles, but it is not a universal qualification for every sustainability position.
Reporting is more reliable when teams can trace a disclosed figure or statement back to its source, method, owner, and review. CSOs can improve that evidence trail by documenting assumptions, data gaps, and changes in methodology. Clear communication distinguishes measured results from estimates, targets, and future plans, rather than implying that a commitment is already an outcome.
| Work area | Practical question | Useful evidence |
|---|---|---|
| Strategy | Who owns each priority and action? | Approved plan, named owners, and review dates |
| Measurement | Can reported information be traced and checked? | Data sources, methods, assumptions, and review records |
| Value chain | Where can the organization influence an impact? | Supplier or product analysis and documented engagement |
| Reporting | Are progress and limitations described clearly? | Consistent figures, definitions, and explanations of gaps |
Work across teams and the value chain
CSOs often lead through influence rather than direct authority over every function. They work with finance on planning, procurement on supplier expectations, operations on implementation, and product teams on design choices. The practical skill is to establish shared goals and responsibilities while respecting each team’s expertise and constraints.
Value-chain work can involve understanding impacts beyond the organization’s own sites, prioritizing areas where its decisions may make a difference, and engaging suppliers or customers. Scope depends on the organization and the role. Evidence may include documented engagement, agreed actions, follow-up, and analysis of where information remains incomplete. A one-time request for data is not, by itself, evidence that an impact has changed.
Communicate progress, risks, and limits
CSOs prepare different audiences to make decisions: executives may need implications and choices, employees need clear responsibilities, and external audiences need understandable, supportable information. Communication should be consistent with the underlying evidence and avoid presenting plans as completed results. When results are uncertain or data is incomplete, explaining the limitation and next step supports accountability.
The role can also involve identifying risks and raising concerns when targets, resources, or timelines do not match stated ambitions. Strong communication is not only persuasive; it is accurate, specific, and open about what the organization can and cannot yet demonstrate.
Template: assess the scope of a CSO role
Use these prompts to compare a job description with its likely day-to-day responsibilities:
- Mandate: Which sustainability topics and business units are included?
- Authority: Who does the role report to, and what decisions can it influence?
- Delivery: Which teams own implementation, and how will responsibilities be coordinated?
- Evidence: What data, reporting, or verification work is expected?
- Resources: What team, budget, and access to decision-makers are described?
- First-year outcomes: What specific deliverables and review points are named?
For career exploration, compare current openings at Chief Sustainability Officer roles with related roles such as sustainability manager roles and reporting manager roles. Look for the responsibilities and evidence that match your experience, rather than assuming every CSO role requires the same technical specialization.