Someone in your business has become the sustainability person.
They might work in finance, operations, HR or quality. They know the business. They care about getting things right. So when the customer questionnaire arrives, it lands with them.
Then there is a carbon footprint to update. A policy to review. A tender question nobody feels confident answering.
At some point, someone says: “Do we need to hire a sustainability manager?”
Sometimes, yes.
But before writing the job description, work out what you need: someone driving sustainability every day, occasional specialist advice, or regular access to expertise your existing team can use.
Those are different requirements. They deserve different answers.
What does a sustainability manager actually do?
A sustainability manager helps a business understand its impacts, set priorities and turn commitments into action. The role can include carbon reporting, supplier engagement, policies, employee training, customer requirements and progress reporting.
The balance depends on the business. A manufacturer with several sites has different needs from a software company responding to corporate procurement teams.
The role also needs influence. Someone must be able to challenge purchasing decisions, secure information from colleagues and bring issues to the leadership team.
Before deciding how to resource it, describe the work that needs doing. A long list of sustainability topics is not yet a job description.
When hiring a sustainability manager is the right decision
Hire someone when there is a substantial, continuing workload that needs daily attention and authority inside the business.
Perhaps you operate complex sites, have demanding customer commitments or need to change how products are designed and sourced. Perhaps sustainability is central to your commercial strategy and someone needs to be involved in decisions as they happen.
An internal manager can build relationships, understand operational detail and follow through on changes that require sustained attention.
That can be the better investment. A few consultancy meetings cannot replace a capable employee with the right remit, budget and leadership backing.
An experienced internal manager may still need specialist help. Nobody knows every reporting framework, technical standard and sector requirement. But the core role belongs inside the business.
Three situations where external sustainability support makes more sense
1. You need regular expertise, but not a full role
You have customer requests, annual reporting and an action plan to maintain. The work matters, but there may not be enough of it to justify a dedicated appointment.
This is where retained or fractional sustainability support can fit. You agree priorities, responsibilities and a regular working rhythm with someone who knows your business.
The benefit is continuity. You can return to the same person when the next question arrives, without explaining your business from the beginning.
If you only need one carbon footprint or a specific policy review, a defined project may be enough. You should not need a retainer simply because a consultancy sells one.
2. You need several kinds of expertise
Your immediate question might concern carbon data. Next month, it could be supplier risk, social value or evidence for a customer assessment.
Hiring one person does not automatically cover all those disciplines. A junior hire may need supervision. A senior hire may still need technical specialists.
External support can give you access to a broader range of skills, coordinated around what your business needs. That is useful when the workload changes and you cannot yet define a stable role.
Ask who will actually deliver the work, what expertise is included and what would cost extra. “Access to a team” only helps if you can reach the right people when you need them.
3. You already have an internal owner who needs support
Your operations director may be well placed to lead the programme. Your finance team may already manage much of the data. HR and procurement may be delivering useful work without calling it sustainability.
You may not need to replace any of that. You may need someone to help connect it, identify gaps and check that the approach is sound.
An external adviser can give your internal owner direction, technical support and a second opinion. They can also help colleagues build confidence rather than leaving one person to research every unfamiliar question alone.
This arrangement works when internal time is protected. It does not work if the named owner has no capacity and everyone assumes the consultant can implement changes without them.
“We can manage sustainability internally.” Can you?
You might be able to. Many businesses can, particularly when the requirements are straightforward and someone has the skills and time.
The useful test is what happens in practice:
- Does the person responsible have protected time?
- Can they explain which requirements apply and why?
- Is the evidence current and easy to find?
- Do agreed actions move forward between customer requests?
- Is someone checking whether the work is improving performance?
If the answer is yes, you may only need occasional advice.
If the answer is usually “when we get a quieter month”, the arrangement needs attention. Internal delivery still has a cost: staff time, delayed work and decisions made without enough confidence.
Equally, outsourcing everything does not remove your responsibilities. Leaders still make decisions. Teams still provide data and put actions into practice.
Compare the whole cost, not just the fee
When comparing a sustainability manager with a consultant, include salary, employer costs, recruitment, training, management time and any additional specialist support.
For external support, check the agreed scope, availability, response times, deliverables and additional charges. Include the internal time needed to work with the adviser.
Then compare what each option can realistically achieve. A monthly advisory arrangement and a full-time employee provide different levels of capacity. The cheaper option is poor value if it cannot deliver what you need.
How SHIFT fits
SHIFT is Sustainable X’s retained sustainability support. You get a named consultant and a fixed monthly cost, with support shaped around your business.
We start by understanding where you are, what your customers expect and which priorities deserve attention. From there, we agree a practical plan and how we will work alongside your team.
The purpose is to help you make decisions, maintain credible evidence and keep agreed actions moving. It is also to recognise when your needs have grown enough to justify an internal hire.
If you are weighing up a sustainability manager, external support or a combination of both, let’s talk about what your business actually needs.