Practitioner Programmes for Sustainability Assurance
CS-AP ProgrammeCS3-SCA Programme


Deliver Sustainability Assurance Engagements Under ISSA 5000

The complete practitioner programme: acceptance, planning, risk assessment, evidence, and reporting — with examined certification.


TWO PRACTITIONER PROGRAMMES ONE STANDARD

Practitioner programmes built around the engagement lifecycle
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Each programme develops a distinct set of engagement capabilities. Together, they equip practitioners to deliver and defend sustainability assurance engagements across the full scope of emerging requirements.
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Flagship Practitioner Programme

CS-AP

Certified Sustainability Assurance Practitioner
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The practitioner programme for ISSA 5000. Learn to plan, execute, and report on sustainability assurance engagements from acceptance through to conclusion, with examined certification on completion. Effective for engagements from December 15, 2026.
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8 modules
41 lessons
~45–55 hours
ISSA 5000
View CS-AP Programme
Specialist Certification

CS3-SCA

Certified Scope 3 Supply Chain Auditor

Also available for practitioners specialising in Scope 3 supply chain assurance. Develops the reasoning capabilities required to form defensible conclusions on value chain emissions under conditions of inherent uncertainty. Addresses CSRD and IFRS S2 requirements.
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11 modules
~40 hours
Scope 3 · CSRD · IFRS S2
£1,250
View CS3-SCA Programme
COMPLEMENTARY PRACTICE AREAS

Two programmes. Two practice areas. One professional standard.
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CS-AP teaches the engagement methodology for delivering sustainability assurance under ISSA 5000. CS3-SCA provides the technical depth for the most challenging audit area: Scope 3 value chain emissions. The complete practitioner holds both.


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CS-AP — The Methodology
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Teaches practitioners to deliver the full ISSA 5000 engagement lifecycle: acceptance, planning, risk assessment, materiality, evidence, and reporting. Applicable to every sustainability assurance engagement regardless of subject matter. The methodology every sustainability assurance practitioner needs.

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CS3-SCA — The Specialism
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Addresses the technical complexities specific to Scope 3 emissions: boundary logic, evidence hierarchy, estimation methodology, and completeness assessment across fifteen value chain categories. For practitioners working at the frontier of emissions assurance.

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WHO THESE PROGRAMMES SERVE

Designed for practitioners, not students


Both programmes assume professional assurance experience. They develop applied judgement and engagement methodology, not introductory knowledge.

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Mid-Tier Audit Firms

Practitioners at firms like BDO, Grant Thornton, Mazars, RSM, and Crowe who are being assigned sustainability assurance engagements and need ISSA 5000 competence before the December deadline.
Sustainability Consultancies

Non-audit professionals conducting assurance-type work who need to demonstrate compliance with ISSA 5000 and register with oversight bodies such as the UK FRC.
Verification & Internal Audit

Environmental verification bodies and internal audit teams preparing for external sustainability assurance who need to understand what the assurance process demands.
OUR APPROACH

Methodology built around the examined standard


Every Capability Benchmarks programme begins with the examination. The assessment defines what the practitioner must be able to do. The curriculum exists to build that capability. We understand what professional defensibility requires because we built the standard practitioners are being measured against.
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The same professional discipline that has governed financial reporting for generations now applies to sustainability assurance. The uncertainty is real. The framework for navigating it is not.

Ready to See What Practitioners Learn to Do?
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Walk through the CS-AP practitioner programme module by module — what candidates learn to do at each phase of the engagement — and see how the examined certification is structured. Or explore the specialist CS3-SCA programme for Scope 3 supply chain assurance.
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CS-AP Programme CS3-SCA Programme
Capability Benchmarks