A4S is an independent audit, advisory, assurance and assessment firm. We turn ISO standards into governance that holds up — under audit, under regulation, and under pressure.
Dr. Orlando Olumide Odejide Managing Partner — leads A4S across Africa, the United Kingdom and Canada.
A control environment that survives the audit.
Corporate governance, enterprise risk, compliance, anti-bribery, whistleblowing and fraud control — designed against ISO 37000, 31000, 37301, 37001, 37002 and 37003, then tested.
Business GRC practice Governance, risk, compliance, audit, anti-bribery and fraud control.
Report what you actually do.
SDG management systems with ISO 53001 and ISO 37101, ESG under IWA 48, and human capital reporting with ISO 30414 — built so the numbers can be evidenced.
Sustainability practice SDGs, ESG, climate adaptation and human capital reporting.
Certify your people. Keep the capability.
Accredited GRC, sustainability and AI certification pathways delivered by the same practitioners who build the systems — so the system still runs after we leave the room.
Certification pathways Accredited training for teams and individuals across all six practices.
Certified management systems
Our own quality and information security management systems are assessed and registered by TNV, a certification body accredited by IAS under the IAF arrangement. Both certificates run to September 2029, with surveillance audits every year.
Quality
Quality Management System
Provision of audit and advisory services covering strategy management, internal audit and advisory management, business development, finance, human resources and operations.
Information security
Information Security Management System
Information security, cybersecurity and privacy protection for the processes, people, information and assets behind our audit and advisory services, in line with the Statement of Applicability.
Who we are
Audit, Advisory, Assurance & Assessment Services Limited works with banks, regulators, technology firms, public bodies and donor-funded organisations across Nigeria and Ghana.
Every recommendation we make traces back to a published clause — an ISO requirement, a regulator’s expectation, or a framework the organisation is already measured against. That keeps our advice checkable. It also keeps our own work auditable, which matters more in this profession than in most.
The firm is certified to ISO 9001:2015 for quality and ISO/IEC 27001:2022 for information security, registered with the Special Control Unit against Money Laundering in Nigeria and the Public Procurement Authority in Ghana, and accredited by the Federal Ministry of Environment to operate as an environmental consultant.
Our vision
To be the leading African brand in audit and advisory services for ISO standards and international best practice.
Our mission
To add value to organizations and people with every interaction.
Our quality statement
We are committed to providing our customers with excellent services that exceed their expectations, by continually improving our business strategy, processes, system, personnel and environment at all times.
How an engagement runs
Where the organisation actually stands against the standard — evidenced clause by clause, not assumed from a questionnaire.
The management system that closes the gap, sized to how the business genuinely runs rather than to a template.
Internal audit, management review and certification support, carried through until the system holds on its own.
Our values
Competence is the licence. Excellence is the habit.
CLIPE — the five commitments every A4S engagement is measured against.
Where we work
Regulated industries carry their own evidence burden. These are the sectors our partners and auditors have spent their careers in.
Banking, insurance, pensions and fintech
Production, quality and supply chain
Network, data and service assurance
Asset, safety and environmental systems
Federal and state government bodies
Institutions and awarding bodies
Grant assurance and reporting
Platforms, payments and data services
What we do
Each practice is anchored to a named standard stack. Nothing is advisory theatre — every engagement produces artefacts an auditor, a regulator or a board can inspect.
Corporate governance, enterprise risk management, compliance, audit management, anti-bribery, whistleblowing, fraud control and project management — designed, implemented and independently tested.
IT governance, service management, information security, cybersecurity, business continuity, data privacy, cloud security and enterprise architecture — mapped to both ISO standards and the frameworks your regulator already recognises.
SDG management systems, sustainable communities, ESG under IWA 48, human capital reporting and DEI — structured so disclosures trace back to controls and records rather than intentions.
Quality management and Lean Six Sigma, occupational health and safety, environmental management, climate adaptation and facility management — implemented to certification readiness.
Employee engagement, recruitment, human governance, workforce planning, learning and development, and a full HR management system — aligned to the ISO 30000 series and backed by a free assessment and diagnostic.
AI management systems, machine learning frameworks, data quality, bias and ethical concerns, governance implications and system impact assessment — so AI adoption arrives with its controls already attached.
Membership record
On 17 August 2026 the firm was formally admitted to The ESG Institute’s global community of sustainability organisations, having met the criteria of its corporate membership framework.
It sits behind work already in the field for clients across Nigeria and Ghana — SDG management systems, ESG implementation under IWA 48, environmental and climate adaptation systems, and GRI-aligned reporting.
Issued by the-esg-institute.org
Why A4S
Our own quality and information security management systems are certified to ISO 9001:2015 and ISO/IEC 27001:2022, with yearly surveillance audits — the same discipline we ask of clients.
Every deliverable cites the clause it satisfies. No generic frameworks, no advice that cannot be traced to a published requirement.
Implementation is paired with accredited training, so your team can run, audit and improve the system without us in the room.
Offices in Lagos, Abuja and Accra, with engagement experience spanning Africa, the United Kingdom and Canada.
Governance, IT, sustainability, QHSEC, HR and AI standards are integrated into one management system rather than six parallel silos.
Delivery is backed by accreditations and memberships with 25 professional and awarding bodies across audit, IT, HR, safety and sustainability.
Training & certification
Certification courses are delivered by the same practitioners who build the systems, and map to named standards and to the roles that carry them.
Thirteen accredited courses, mapped to standard and to audience
Internal and external audit, risk, control and compliance professionals
CSR, ESG and SDG professionals
Lawyers, legal counsel, company secretaries and compliance professionals
Sustainability and CSR professionals, public and NGO officials
Compliance, risk, control and audit professionals
Sustainability and CSR professionals, public and NGO officials
Risk, control and compliance professionals; public and not-for-profit officials
HR professionals and senior business managers
Compliance, control and audit professionals
Compliance, control and audit professionals
Audit, control and compliance professionals
Change, transformation and HR professionals
Corporate communications, marketing and branding professionals
Eight certification tracks, executive awareness through lead auditor
Beyond the practice
A not-for-profit polytechnic delivering free entrepreneurship and business management, software application development and cybersecurity courses to the public.
About the college
A continent-wide programme building sustainability and ESG competence in African organisations and public institutions.
The TAS programmeLeadership
Engagements are led by partners, not handed down. These are the people accountable for what leaves this firm.
Leads A4S across Africa, the United Kingdom and Canada. A governance, risk and compliance professional, programme director and enterprise architect with over 25 years of experience across more than 1,000 initiatives in financial services, manufacturing, telecommunications, energy and education. Founder of the Transformation College of Business and Technology.
Profile
Brings over a decade of professional expertise in information technology, cybersecurity and ISO management systems. Specialises in management system audit and advisory across ISO 27001, ISO 22301, ISO 9001 and PCI DSS, data protection and privacy under GDPR and the Ghana Data Protection Act, and IT service delivery with NIST CSF, ITIL and COBIT.
[email protected]
Edith is the Chief Operating Officer (COO) at A4S and Programme Director at Transformation College of Business and Technology (TCBT), a Not-For-Profit initiative of A4S. She is a seasoned business leader and has over 15 years of experience in business development and operations management across FMCGs, marketing companies, and the education sector. At A4S, she provides strategy, direction and management for strategic projects and initiatives. .
Contact operationsOur clients
Banks, payment infrastructure, insurers, technology firms, exchanges and public bodies across two markets.
Partnership & accreditation
Certification bodies, chartered institutes and awarding organisations whose accreditation, partnership or membership underpins A4S delivery.
Tell us the standard you are working towards and the deadline you are working to. We will tell you what it actually takes.
Offices
Whether you're exploring our services, need help choosing the right solution, or want to discuss a specific project; we’re here to support you.
Let’s talk. Your next step starts with a conversation.
A4S – Audit, Advisory, Assurance and Assessment Services Limited – is a Nigerian-based professional services firm with over 15 years of experience supporting more than 500 clients across various industries.
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