Hire an Interim CSO · Interim CSO Jobs UK
Interim Chief Sustainability Officer Jobs · Hire an interim chief sustainability officer, or hire a chief sustainability officer
Hire an interim CSO for full-time temporary sustainability leadership when your organisation requires immediate ESG expertise during a transition — or browse current interim Chief Sustainability Officer opportunities across UK companies for experienced CSOs seeking interim assignments.
How a brief runswhat we undertake
- 01Brief30-MINUTE SCOPING CALLDay 0
- 02Shortlist of 3–5VETTED · RATE BENCHMARK · IR35After the brief
- 03InterviewsYOU MEET THE SHORTLISTYour diary
- 04Scoped startFIRST-MONTH OUTCOMES AGREEDYou set the date
- 05Fractional, interim and permanentIR35 POSITION SET OUTOn every brief
Shortlist3–5
15 minutes · video or phone
Book 15 minutes to hire an interim CSO
Tell us the scope and the days a week. We come back with Interim CSO candidates, their day rates and availability.
- 0115 minutes, video or phone
- 02We scope the role and the days a week
- 03A shortlist of 3–5 after the call
- 04Fractional, interim and permanent briefs
Pick a day that suits · live availability
Live roles · last 3 months
Live Fractional chief sustainability officer jobs
No live Fractional chief sustainability officer roles in the last three months. Showing live fractional executive roles instead.
- FractionalSyndicated
Fractional CISO (Contract / Project Based)
Cambridge Spark · United Kingdom
est £1,500/day2 d/wk - FractionalSyndicated
Head of Medical Compliance, Governance & Diligence (Fractional)
CNX Therapeutics Ltd · Greater London
est £1,000/dayGreater London - FractionalSyndicated
Head of Applied Legal – AI Product (Fractional)
Stealth Startup · London
est £1,600/day2 d/wk - FractionalSyndicated
Fractional Product Practice Leader - 9 Month Contract
Tails.com · London
est £1,000/day2 d/wk - FractionalSyndicated
Fractional CPO
Log my Care · City of London
est £3,250/day3 d/wk - FractionalSyndicated
Fractional Finance Directors
PWF Associates Limited · Manchester
est £750/dayManchester - FractionalSyndicated
Fractional legal counsel
Nifina · London
est £750/dayLondon - FractionalExclusive
Fractional COO
Confidential client (Fractional Quest mandate) · London
Rate n/aLondon - FractionalSyndicated
Fractional Financial Controller
MarcoPolo Learning · City of Westminster
est £750/day2 d/wk
Current interim CSO opportunities
Fractional recruitment works differently from a permanent search — shorter, scoped by days a week, and priced on the engagement. Send a Interim CSO brief and we come back with a shortlist of three to five vetted candidates.
01/ the role
What is an interim CSO?
An interim Chief Sustainability Officer provides full-time sustainability leadership on a temporary basis. The interim Chief Sustainability Officer market is emerging and lacks a published UK day-rate benchmark. As a reference, Exec Capital publishes interim C-suite day rates running from £600–£800 for smaller or less complex mandates to £1,500–£3,500 for FTSE, major crisis or turnaround assignments (Exec Capital 2026); ESG leadership sits within that span, but we don't publish a CSO figure we can't source.
Companies typically hire an interim CSO during critical ESG situations - regulatory compliance deadlines, sustainability reporting requirements, acquisition integration, or major sustainability transformation initiatives. They provide immediate expertise, stabilise ESG operations, and implement strategic changes while companies secure permanent sustainability leadership.
How to hire an interim Chief Sustainability Officer
To hire an interim CSO, submit a brief covering the ESG mandate - compliance deadline, incident remediation, or transformation - and we come back with a shortlist of 3–5 matched on sector experience; the start date is then agreed with the candidate. If you're searching for an interim CSO for hire on a part-time rather than full-time basis, a fractional CSO covers ongoing strategic sustainability development at 1-2 days a week.
02/ scope
Core interim CSO responsibilities
ESG compliance and reporting
Ensuring immediate compliance with sustainability regulations, managing ESG reporting deadlines, and implementing frameworks for environmental, social, and governance metrics. Establishing rapid response capabilities for regulatory requirements and stakeholder reporting. Many interim CSOs require robust carbon reporting software for accurate emissions tracking and UK SRS compliance. Stay informed about the UK SRS consultation process and upcoming FCA proposals.
Sustainability programme delivery
Leading urgent sustainability initiatives, carbon reduction projects, or ESG transformation programmes that cannot wait for permanent recruitment. Managing time-sensitive sustainability commitments, regulatory deadlines, or stakeholder requirements requiring immediate senior oversight.
Stakeholder management and transition
Managing relationships with investors, regulators, and sustainability stakeholders during leadership transitions. Preparing comprehensive handover documentation, establishing processes for successor, and ensuring smooth transition to permanent CSO.
Crisis management and remediation
Addressing urgent sustainability issues, environmental incidents, or ESG compliance failures requiring immediate senior attention. Implementing remediation plans, managing stakeholder communications, and restoring sustainability credibility.
03/ timing
When to hire an interim CSO
Common scenarios where companies hire an interim CSO for immediate sustainability leadership with full-time commitment
Scenario 01
CSO Departure
— your CSO has left and you need immediate sustainability leadership during recruitment
Scenario 02
Regulatory Deadline
— urgent ESG reporting or regulatory requirements need immediate senior oversight
Scenario 03
Environmental Crisis
— environmental incident or ESG failure requires experienced crisis management
Scenario 04
ESG Transformation
— net-zero commitment or sustainability transformation needs dedicated leadership
04/ vetting
How vetting and shortlisting work
Our five-stage process for matching you with the right interim CSO, with emphasis on ESG expertise — we come back with a shortlist of 3–5
- 01
Qualification screen
Verify Interim CSO tenure, sector context and stage fit.
SOURCING - 02
Mandate fit
Match to your situation — stage, board dynamics, timing.
MATCHING - 03
Reference deep-dive
We take references ourselves, from recent past clients — real outcomes, not titles.
VERIFY - 04
Shortlist
Three to five candidates with day rate, availability and IR35 position set out.
SHORTLIST OF 3–5
05/ sustainability interim recruitment
Sustainability interim recruitment: what to test for
Sustainability interim recruitment is harder to get right while the reporting ground keeps moving. The UK government has published UK Sustainability Reporting Standards S1 and S2, based on the ISSB's global baseline, for voluntary use, and the FCA has consulted on whether listed companies should report against them (GOV.UK: UK Sustainability Reporting Standards). An interim sustainability leader should be able to explain where your organisation stands against those standards and what the board has to decide next, not just run a carbon inventory.
Test for three things. First, reporting: has the candidate prepared climate-related disclosures, and can they show the governance behind them? Second, delivery: have they run a decarbonisation or transition programme with named owners and budgets? Third, credentials. The Institute of Sustainability and Environmental Professionals, formerly IEMA, grades its members from Associate through Practitioner to Full and Fellow, and is the largest accreditor of Chartered Environmentalist status (ISEP membership). Membership is no substitute for a track record, but it is easy to check.
We send a shortlist of 3–5 interim CSOs or interim sustainability leaders, each with day rate, availability and IR35 position set out. If the need is part-time and ongoing, see fractional sustainability jobs or hire a fractional CSO.
06/ green claims
Sustainability fractional CMO or CSO: who owns the green claims?
Companies looking for a sustainability fractional CMO usually have a marketing problem with a sustainability edge: a product, brand or business whose environmental claims now carry legal risk. The CMA's Green Claims Code says environmental claims must be truthful and accurate, clear and unambiguous, must not omit or hide important information, must compare fairly, must consider the full life cycle and must be substantiated, and the CMA has opened consumer protection cases over green claims (GOV.UK: making environmental claims). The unfair trading rules those claims are judged against now sit in the Digital Markets, Competition and Consumers Act 2024 (CMA: unfair commercial practices).
So decide who owns what. A fractional or interim CMO owns the message, the channels and the campaigns. A CSO owns the evidence: the data, the methodology and the targets the claims rest on. The two need an agreed sign-off route before anything is published. If you are hiring for the marketing side, see hire a fractional CMO or hire an interim CMO; if the evidence is the gap, an interim CSO is the hire.
07/ questions
Interim CSO FAQ
The questions people ask before bringing in an interim CSO.
Book 15 minutes · shortlist of 3–5
Bring the brief. We architect the team.
A shortlist of 3–5 with day rate, availability and IR35 position set out, after five-stage vetting.
