Yes. ESRS E1 requires material scope 3 emissions in your climate disclosure, and for most companies with complex supply chains they are material. A scope 3 consultant prioritizes the relevant categories, designs supplier data requests and structures the inventory so it holds up under the third-party assurance CSRD requires.
What does a scope 3 consultant actually do?
A scope 3 consultant specializes in helping organizations identify, measure, and manage their indirect greenhouse gas emissions, specifically those that occur across their value chain rather than from their own operations. This includes emissions from purchased goods and services, business travel, employee commuting, product use, and end-of-life disposal, among others.
The work varies depending on the consultant’s specialization. Some scope 3 consultants focus primarily on data collection and emissions calculation, working through each of the fifteen categories defined under the GHG Protocol to build a complete emissions inventory. Others are more focused on strategy, helping organizations set reduction targets or align with frameworks like the SBTi, while some specialize in reporting, translating raw emissions data into disclosures that meet specific regulatory requirements.
What they all share is deep technical knowledge of indirect emissions, which are notoriously difficult to measure because they rely heavily on supplier data, spend-based estimates, and activity data that organizations don’t always have easy access to. That’s precisely why scope 3 work tends to require a dedicated specialist rather than a generalist sustainability consultant. Understanding what that specialist actually delivers is the first step — the next is knowing where their work fits within your CSRD obligations.
Which CSRD disclosures require scope 3 data?
Under the CSRD, scope 3 emissions data is required as part of the European Sustainability Reporting Standards, specifically ESRS E1, which covers climate change. Organizations subject to CSRD must disclose their full greenhouse gas inventory, and that includes upstream and downstream scope 3 emissions where they are material.
Materiality is the key word here. CSRD uses a double materiality assessment to determine which topics an organization must report on, and if scope 3 emissions are financially material to your business or have a significant impact on the environment, they will need to be disclosed. For most organizations with complex supply chains or products with significant end-of-life emissions, scope 3 will almost certainly be considered material.
Beyond the emissions inventory itself, CSRD also requires organizations to disclose their climate transition plans, reduction targets, and progress against those targets. If your targets include scope 3 — which SBTi-aligned targets typically do — you’ll need robust scope 3 data to back them up. In short, scope 3 data touches multiple parts of a CSRD disclosure, not just a single checkbox. Given how much ground needs to be covered, it’s worth understanding how a specialist can help you move through it more efficiently.
How can a scope 3 consultant speed up CSRD compliance?
A scope 3 consultant can significantly reduce the time it takes to get your emissions inventory in shape for CSRD reporting by bringing both technical expertise and a structured methodology to what is often an overwhelming data challenge.
Here’s where their contribution tends to be most valuable:
- Scoping and prioritization: Rather than trying to measure all fifteen scope 3 categories at once, a consultant can identify which categories are most significant for your business and focus efforts there first. This prevents wasted time on categories that won’t move the needle on your disclosure.
- Data collection design: One of the biggest bottlenecks in scope 3 reporting is getting usable data from suppliers and other value chain partners. A consultant with experience in this area knows how to design data requests, choose appropriate calculation methods when primary data isn’t available, and document assumptions in a way that satisfies auditors.
- Avoiding rework: CSRD has specific requirements around how emissions data should be calculated, presented, and assured. A consultant familiar with ESRS E1 can make sure the data is structured correctly from the start, rather than having to reformat everything later under time pressure.
Taken together, these contributions mean you’re not reinventing the wheel at every step of the process. The consultant brings a proven approach, which frees your internal team to focus on decisions rather than methodology debates — a meaningful time saving when CSRD deadlines are firm. Of course, capturing those benefits depends on bringing the right person in at the right moment.
When should an organization bring in a scope 3 consultant?
The right time to bring in a scope 3 consultant is before your data collection process begins, not after you’ve already gathered incomplete or inconsistent data. Getting the methodology right early prevents costly corrections later and makes the overall compliance process much smoother.
That said, there are a few specific situations where bringing in a specialist becomes particularly urgent. If your organization is approaching its first CSRD reporting cycle and hasn’t yet conducted a double materiality assessment, a scope 3 specialist can help you understand whether and how scope 3 emissions will factor into your disclosure obligations. If you’ve already done a materiality assessment and scope 3 has come up as material, you need someone who can move quickly to build your emissions inventory.
Organizations that have already attempted scope 3 measurement internally and found the results inconsistent or hard to defend also benefit from bringing in a consultant, even mid-process. A specialist can review what’s been done, identify gaps, and get the inventory to a standard that will hold up under third-party assurance, which CSRD requires. Once you’ve decided to bring someone in, the next question is what kind of expertise you actually need.
What’s the difference between a scope 3 consultant and a full CSRD consultant?
A scope 3 consultant specializes in value chain emissions, while a full CSRD consultant covers the entire breadth of the European Sustainability Reporting Standards, which spans environmental, social, and governance topics well beyond climate. They’re complementary rather than interchangeable, and understanding the distinction helps you bring in the right expertise at the right time.
A CSRD consultant typically helps organizations navigate the full reporting framework, including the double materiality assessment, gap analysis across all relevant ESRS standards, and the overall structure of the sustainability statement. They’re generalists within the CSRD context, which means they understand how everything fits together but may not have the deep technical knowledge needed to build a defensible scope 3 inventory from scratch.
A scope 3 consultant, on the other hand, brings specialized expertise in GHG accounting methodology, supplier engagement, and emissions data quality. They may not be familiar with every corner of CSRD, but they know the climate-related disclosures inside out and can produce the emissions data that a CSRD report requires.
Many organizations find that they need both at different stages — a CSRD consultant to set the overall reporting strategy and identify what needs to be disclosed, and a scope 3 specialist to handle the technical emissions work. Knowing which gap you’re trying to fill makes it much easier to find the right person for the job, and that’s exactly where we can help.
Ready to find the right scope 3 expert for your CSRD project?
Whether you need a scope 3 specialist to build your emissions inventory from scratch or someone to pick up where your internal team left off, we can match you with a pre-screened expert who fits your exact situation. At Dazzle, we work with a network of over 150 sustainability professionals, so you’re not getting a one-size-fits-all consultant — you’re getting someone whose background aligns with your specific challenge.
We know that CSRD timelines don’t wait, which is why we can connect you with the right expert within 48 hours. And because our freelancers work on a project or interim basis, you get the flexibility to bring in exactly the level of support you need, without the overhead of a large consultancy. Reach out to our team and let’s figure out who’s the best fit for you.
Working on your CSRD report?
The free CSRD Evidence Register lists all 14 documents, what each costs you and where teams get stuck, from a panel with Dazzle clients PostNL and Samskip.
